Travis: Test build against system libs (& Qt4)
Travis: Test build against system libs (& Qt4)

prusnak/bitcoin,practicalswift/bitcoin,stamhe/bitcoin,cryptoprojects/ultimateonlinecash,guncoin/guncoin,sstone/bitcoin,brandonrobertz/namecoin-core,ericshawlinux/bitcoin,vertcoin/vertcoin,MeshCollider/bitcoin,instagibbs/bitcoin,afk11/bitcoin,n1bor/bitcoin,Rav3nPL/bitcoin,bitcoinsSG/bitcoin,MazaCoin/maza,domob1812/bitcoin,andreaskern/bitcoin,bitcoinsSG/bitcoin,rnicoll/bitcoin,thrasher-/litecoin,digibyte/digibyte,ElementsProject/elements,fujicoin/fujicoin,RHavar/bitcoin,bitcoin/bitcoin,mb300sd/bitcoin,kallewoof/bitcoin,dscotese/bitcoin,randy-waterhouse/bitcoin,litecoin-project/litecoin,monacoinproject/monacoin,jlopp/statoshi,GlobalBoost/GlobalBoost,rnicoll/dogecoin,mm-s/bitcoin,FeatherCoin/Feathercoin,rawodb/bitcoin,TheBlueMatt/bitcoin,kazcw/bitcoin,rnicoll/bitcoin,Flowdalic/bitcoin,jambolo/bitcoin,Bushstar/UFO-Project,kallewoof/bitcoin,peercoin/peercoin,lbryio/lbrycrd,DigitalPandacoin/pandacoin,myriadteam/myriadcoin,prusnak/bitcoin,particl/particl-core,brandonrobertz/namecoin-core,alecalve/bitcoin,thrasher-/litecoin,laudaa/bitcoin,untrustbank/litecoin,pataquets/namecoin-core,Sjors/bitcoin,RHavar/bitcoin,viacoin/viacoin,n1bor/bitcoin,sebrandon1/bitcoin,Kogser/bitcoin,MarcoFalke/bitcoin,maaku/bitcoin,starwels/starwels,mm-s/bitcoin,domob1812/huntercore,afk11/bitcoin,1185/starwels,jtimon/bitcoin,lbryio/lbrycrd,ajtowns/bitcoin,rnicoll/bitcoin,jambolo/bitcoin,rnicoll/bitcoin,h4x3rotab/BTCGPU,digibyte/digibyte,GroestlCoin/GroestlCoin,apoelstra/bitcoin,vertcoin/vertcoin,domob1812/huntercore,rnicoll/dogecoin,bitcoinsSG/bitcoin,midnightmagic/bitcoin,EthanHeilman/bitcoin,joshrabinowitz/bitcoin,jamesob/bitcoin,fanquake/bitcoin,jtimon/bitcoin,andreaskern/bitcoin,mruddy/bitcoin,guncoin/guncoin,viacoin/viacoin,myriadteam/myriadcoin,Kogser/bitcoin,thrasher-/litecoin,namecoin/namecoin-core,dscotese/bitcoin,ajtowns/bitcoin,myriadteam/myriadcoin,vertcoin/vertcoin,bitcoinknots/bitcoin,tecnovert/particl-core,ahmedbodi/vertcoin,jonasschnelli/bitcoin,wellenreiter01/Feathercoin,ppcoin/ppcoin,jonasschnelli/bitcoin,tjps/bitcoin,pstratem/bitcoin,kallewoof/bitcoin,cryptoprojects/ultimateonlinecash,MazaCoin/maza,yenliangl/bitcoin,untrustbank/litecoin,FeatherCoin/Feathercoin,myriadteam/myriadcoin,ahmedbodi/vertcoin,apoelstra/bitcoin,sipsorcery/bitcoin,mitchellcash/bitcoin,tecnovert/particl-core,mm-s/bitcoin,anditto/bitcoin,lateminer/bitcoin,globaltoken/globaltoken,paveljanik/bitcoin,sebrandon1/bitcoin,jmcorgan/bitcoin,jamesob/bitcoin,OmniLayer/omnicore,1185/starwels,ElementsProject/elements,ericshawlinux/bitcoin,sipsorcery/bitcoin,monacoinproject/monacoin,OmniLayer/omnicore,lbryio/lbrycrd,nikkitan/bitcoin,instagibbs/bitcoin,rnicoll/bitcoin,sarielsaz/sarielsaz,brandonrobertz/namecoin-core,paveljanik/bitcoin,yenliangl/bitcoin,domob1812/bitcoin,sipsorcery/bitcoin,practicalswift/bitcoin,Gazer022/bitcoin,untrustbank/litecoin,laudaa/bitcoin,ryanofsky/bitcoin,GroestlCoin/GroestlCoin,jlopp/statoshi,pstratem/bitcoin,bitcoin/bitcoin,namecoin/namecoin-core,andreaskern/bitcoin,domob1812/namecore,bitcoin/bitcoin,bitcoinsSG/bitcoin,namecoin/namecoin-core,untrustbank/litecoin,rawodb/bitcoin,ahmedbodi/vertcoin,vertcoin/vertcoin,GroestlCoin/GroestlCoin,gjhiggins/vcoincore,r8921039/bitcoin,1185/starwels,EthanHeilman/bitcoin,jamesob/bitcoin,sstone/bitcoin,mb300sd/bitcoin,ajtowns/bitcoin,alecalve/bitcoin,fujicoin/fujicoin,prusnak/bitcoin,namecoin/namecore,jamesob/bitcoin,Kogser/bitcoin,qtumproject/qtum,OmniLayer/omnicore,anditto/bitcoin,Kogser/bitcoin,sstone/bitcoin,gmaxwell/bitcoin,ryanofsky/bitcoin,cryptoprojects/ultimateonlinecash,jmcorgan/bitcoin,bitcoinsSG/bitcoin,mitchellcash/bitcoin,GroestlCoin/bitcoin,jmcorgan/bitcoin,Sjors/bitcoin,bitcoinknots/bitcoin,gjhiggins/vcoincore,sarielsaz/sarielsaz,dscotese/bitcoin,OmniLayer/omnicore,prusnak/bitcoin,namecoin/namecore,Kogser/bitcoin,Christewart/bitcoin,afk11/bitcoin,donaloconnor/bitcoin,dscotese/bitcoin,Rav3nPL/bitcoin,h4x3rotab/BTCGPU,myriadteam/myriadcoin,GroestlCoin/bitcoin,peercoin/peercoin,Christewart/bitcoin,CryptArc/bitcoin,sarielsaz/sarielsaz,Christewart/bitcoin,tjps/bitcoin,tecnovert/particl-core,kazcw/bitcoin,ajtowns/bitcoin,MarcoFalke/bitcoin,pataquets/namecoin-core,n1bor/bitcoin,andreaskern/bitcoin,droark/bitcoin,stamhe/bitcoin,yenliangl/bitcoin,domob1812/bitcoin,Gazer022/bitcoin,paveljanik/bitcoin,sipsorcery/bitcoin,bespike/litecoin,Bushstar/UFO-Project,DigitalPandacoin/pandacoin,Xekyo/bitcoin,laudaa/bitcoin,afk11/bitcoin,Christewart/bitcoin,jmcorgan/bitcoin,vmp32k/litecoin,mitchellcash/bitcoin,qtumproject/qtum,paveljanik/bitcoin,trippysalmon/bitcoin,domob1812/bitcoin,ericshawlinux/bitcoin,kazcw/bitcoin,Xekyo/bitcoin,trippysalmon/bitcoin,vmp32k/litecoin,trippysalmon/bitcoin,CryptArc/bitcoin,practicalswift/bitcoin,rawodb/bitcoin,sebrandon1/bitcoin,globaltoken/globaltoken,mb300sd/bitcoin,domob1812/namecore,DigitalPandacoin/pandacoin,ahmedbodi/vertcoin,practicalswift/bitcoin,Sjors/bitcoin,jtimon/bitcoin,fanquake/bitcoin,droark/bitcoin,ahmedbodi/vertcoin,wellenreiter01/Feathercoin,globaltoken/globaltoken,EthanHeilman/bitcoin,particl/particl-core,AkioNak/bitcoin,h4x3rotab/BTCGPU,RHavar/bitcoin,myriadcoin/myriadcoin,randy-waterhouse/bitcoin,afk11/bitcoin,alecalve/bitcoin,fujicoin/fujicoin,domob1812/namecore,cdecker/bitcoin,alecalve/bitcoin,ppcoin/ppcoin,wellenreiter01/Feathercoin,namecoin/namecoin-core,joshrabinowitz/bitcoin,r8921039/bitcoin,FeatherCoin/Feathercoin,bespike/litecoin,Kogser/bitcoin,myriadcoin/myriadcoin,rnicoll/dogecoin,andreaskern/bitcoin,mitchellcash/bitcoin,instagibbs/bitcoin,myriadcoin/myriadcoin,nikkitan/bitcoin,jtimon/bitcoin,AkioNak/bitcoin,stamhe/bitcoin,bitcoinknots/bitcoin,myriadcoin/myriadcoin,litecoin-project/litecoin,droark/bitcoin,lbryio/lbrycrd,Kogser/bitcoin,gjhiggins/vcoincore,pataquets/namecoin-core,litecoin-project/litecoin,yenliangl/bitcoin,domob1812/huntercore,AkioNak/bitcoin,gjhiggins/vcoincore,EthanHeilman/bitcoin,stamhe/bitcoin,viacoin/viacoin,qtumproject/qtum,Bushstar/UFO-Project,mb300sd/bitcoin,namecoin/namecoin-core,GroestlCoin/bitcoin,jonasschnelli/bitcoin,afk11/bitcoin,ElementsProject/elements,Rav3nPL/bitcoin,EthanHeilman/bitcoin,midnightmagic/bitcoin,qtumproject/qtum,deeponion/deeponion,GroestlCoin/bitcoin,kazcw/bitcoin,cdecker/bitcoin,ericshawlinux/bitcoin,pstratem/bitcoin,cdecker/bitcoin,vmp32k/litecoin,MeshCollider/bitcoin,achow101/bitcoin,Flowdalic/bitcoin,EthanHeilman/bitcoin,peercoin/peercoin,DigitalPandacoin/pandacoin,tjps/bitcoin,prusnak/bitcoin,BTCGPU/BTCGPU,yenliangl/bitcoin,mm-s/bitcoin,jambolo/bitcoin,lbryio/lbrycrd,jnewbery/bitcoin,particl/particl-core,CryptArc/bitcoin,rawodb/bitcoin,BTCGPU/BTCGPU,apoelstra/bitcoin,achow101/bitcoin,cryptoprojects/ultimateonlinecash,kazcw/bitcoin,Kogser/bitcoin,maaku/bitcoin,droark/bitcoin,BTCGPU/BTCGPU,bespike/litecoin,guncoin/guncoin,Xekyo/bitcoin,jmcorgan/bitcoin,ElementsProject/elements,trippysalmon/bitcoin,qtumproject/qtum,myriadteam/myriadcoin,alecalve/bitcoin,globaltoken/globaltoken,mruddy/bitcoin,midnightmagic/bitcoin,lateminer/bitcoin,jamesob/bitcoin,kallewoof/bitcoin,JeremyRubin/bitcoin,litecoin-project/litecoin,starwels/starwels,rawodb/bitcoin,Kogser/bitcoin,joshrabinowitz/bitcoin,JeremyRubin/bitcoin,trippysalmon/bitcoin,MazaCoin/maza,FeatherCoin/Feathercoin,pataquets/namecoin-core,vmp32k/litecoin,nikkitan/bitcoin,mm-s/bitcoin,n1bor/bitcoin,jnewbery/bitcoin,sarielsaz/sarielsaz,domob1812/namecore,Gazer022/bitcoin,joshrabinowitz/bitcoin,deeponion/deeponion,gjhiggins/vcoincore,qtumproject/qtum,deeponion/deeponion,monacoinproject/monacoin,MarcoFalke/bitcoin,instagibbs/bitcoin,cryptoprojects/ultimateonlinecash,CryptArc/bitcoin,digibyte/digibyte,maaku/bitcoin,GroestlCoin/bitcoin,TheBlueMatt/bitcoin,RHavar/bitcoin,sarielsaz/sarielsaz,Christewart/bitcoin,MazaCoin/maza,cdecker/bitcoin,achow101/bitcoin,guncoin/guncoin,ElementsProject/elements,fujicoin/fujicoin,stamhe/bitcoin,h4x3rotab/BTCGPU,GroestlCoin/GroestlCoin,gmaxwell/bitcoin,sebrandon1/bitcoin,anditto/bitcoin,BTCGPU/BTCGPU,fanquake/bitcoin,namecoin/namecore,OmniLayer/omnicore,domob1812/huntercore,yenliangl/bitcoin,randy-waterhouse/bitcoin,Bushstar/UFO-Project,trippysalmon/bitcoin,MarcoFalke/bitcoin,brandonrobertz/namecoin-core,bitcoin/bitcoin,Gazer022/bitcoin,ryanofsky/bitcoin,jnewbery/bitcoin,Flowdalic/bitcoin,jlopp/statoshi,dscotese/bitcoin,wellenreiter01/Feathercoin,starwels/starwels,domob1812/namecore,tjps/bitcoin,GlobalBoost/GlobalBoost,peercoin/peercoin,nikkitan/bitcoin,sebrandon1/bitcoin,jlopp/statoshi,JeremyRubin/bitcoin,globaltoken/globaltoken,bespike/litecoin,digibyte/digibyte,particl/particl-core,h4x3rotab/BTCGPU,droark/bitcoin,GlobalBoost/GlobalBoost,bespike/litecoin,jnewbery/bitcoin,domob1812/bitcoin,domob1812/huntercore,litecoin-project/litecoin,r8921039/bitcoin,MarcoFalke/bitcoin,peercoin/peercoin,bitcoin/bitcoin,thrasher-/litecoin,Bushstar/UFO-Project,brandonrobertz/namecoin-core,Rav3nPL/bitcoin,Flowdalic/bitcoin,digibyte/digibyte,midnightmagic/bitcoin,bitcoinknots/bitcoin,r8921039/bitcoin,practicalswift/bitcoin,namecoin/namecore,ajtowns/bitcoin,laudaa/bitcoin,cdecker/bitcoin,fujicoin/fujicoin,starwels/starwels,maaku/bitcoin,cryptoprojects/ultimateonlinecash,lateminer/bitcoin,jonasschnelli/bitcoin,jtimon/bitcoin,rawodb/bitcoin,TheBlueMatt/bitcoin,paveljanik/bitcoin,r8921039/bitcoin,lateminer/bitcoin,mruddy/bitcoin,FeatherCoin/Feathercoin,vertcoin/vertcoin,kallewoof/bitcoin,AkioNak/bitcoin,JeremyRubin/bitcoin,qtumproject/qtum,nikkitan/bitcoin,MeshCollider/bitcoin,BTCGPU/BTCGPU,pstratem/bitcoin,particl/particl-core,tecnovert/particl-core,TheBlueMatt/bitcoin,rnicoll/dogecoin,midnightmagic/bitcoin,litecoin-project/litecoin,kazcw/bitcoin,jtimon/bitcoin,tecnovert/particl-core,Kogser/bitcoin,AkioNak/bitcoin,TheBlueMatt/bitcoin,OmniLayer/omnicore,droark/bitcoin,domob1812/namecore,FeatherCoin/Feathercoin,JeremyRubin/bitcoin,pstratem/bitcoin,mitchellcash/bitcoin,alecalve/bitcoin,donaloconnor/bitcoin,achow101/bitcoin,deeponion/deeponion,mruddy/bitcoin,GlobalBoost/GlobalBoost,laudaa/bitcoin,gmaxwell/bitcoin,pstratem/bitcoin,randy-waterhouse/bitcoin,ericshawlinux/bitcoin,prusnak/bitcoin,apoelstra/bitcoin,ryanofsky/bitcoin,deeponion/deeponion,RHavar/bitcoin,Bushstar/UFO-Project,ppcoin/ppcoin,ahmedbodi/vertcoin,GroestlCoin/GroestlCoin,gmaxwell/bitcoin,GlobalBoost/GlobalBoost,monacoinproject/monacoin,namecoin/namecore,midnightmagic/bitcoin,bitcoin/bitcoin,lateminer/bitcoin,viacoin/viacoin,BTCGPU/BTCGPU,jonasschnelli/bitcoin,JeremyRubin/bitcoin,ryanofsky/bitcoin,paveljanik/bitcoin,mm-s/bitcoin,Flowdalic/bitcoin,mb300sd/bitcoin,AkioNak/bitcoin,MeshCollider/bitcoin,jambolo/bitcoin,gmaxwell/bitcoin,Xekyo/bitcoin,jlopp/statoshi,Rav3nPL/bitcoin,sstone/bitcoin,fanquake/bitcoin,sstone/bitcoin,achow101/bitcoin,jmcorgan/bitcoin,sebrandon1/bitcoin,bespike/litecoin,dscotese/bitcoin,Gazer022/bitcoin,Gazer022/bitcoin,digibyte/digibyte,Flowdalic/bitcoin,CryptArc/bitcoin,wellenreiter01/Feathercoin,tjps/bitcoin,ajtowns/bitcoin,monacoinproject/monacoin,practicalswift/bitcoin,stamhe/bitcoin,andreaskern/bitcoin,h4x3rotab/BTCGPU,lbryio/lbrycrd,rnicoll/bitcoin,RHavar/bitcoin,namecoin/namecoin-core,fujicoin/fujicoin,GroestlCoin/bitcoin,DigitalPandacoin/pandacoin,thrasher-/litecoin,Sjors/bitcoin,jamesob/bitcoin,instagibbs/bitcoin,brandonrobertz/namecoin-core,nikkitan/bitcoin,anditto/bitcoin,Kogser/bitcoin,gmaxwell/bitcoin,rnicoll/dogecoin,GlobalBoost/GlobalBoost,ppcoin/ppcoin,untrustbank/litecoin,Kogser/bitcoin,vertcoin/vertcoin,donaloconnor/bitcoin,mb300sd/bitcoin,globaltoken/globaltoken,gjhiggins/vcoincore,jnewbery/bitcoin,MeshCollider/bitcoin,randy-waterhouse/bitcoin,Xekyo/bitcoin,GlobalBoost/GlobalBoost,1185/starwels,namecoin/namecore,domob1812/huntercore,fanquake/bitcoin,fanquake/bitcoin,TheBlueMatt/bitcoin,mruddy/bitcoin,1185/starwels,achow101/bitcoin,monacoinproject/monacoin,anditto/bitcoin,viacoin/viacoin,maaku/bitcoin,kallewoof/bitcoin,tjps/bitcoin,starwels/starwels,apoelstra/bitcoin,lbryio/lbrycrd,MazaCoin/maza,Rav3nPL/bitcoin,laudaa/bitcoin,domob1812/bitcoin,myriadcoin/myriadcoin,instagibbs/bitcoin,untrustbank/litecoin,sarielsaz/sarielsaz,viacoin/viacoin,particl/particl-core,1185/starwels,pataquets/namecoin-core,n1bor/bitcoin,deeponion/deeponion,vmp32k/litecoin,maaku/bitcoin,jambolo/bitcoin,thrasher-/litecoin,randy-waterhouse/bitcoin,jlopp/statoshi,apoelstra/bitcoin,n1bor/bitcoin,guncoin/guncoin,bitcoinsSG/bitcoin,sstone/bitcoin,Sjors/bitcoin,lateminer/bitcoin,starwels/starwels,joshrabinowitz/bitcoin,MarcoFalke/bitcoin,anditto/bitcoin,r8921039/bitcoin,Christewart/bitcoin,cdecker/bitcoin,MeshCollider/bitcoin,guncoin/guncoin,tecnovert/particl-core,sipsorcery/bitcoin,mitchellcash/bitcoin,GroestlCoin/GroestlCoin,donaloconnor/bitcoin,pataquets/namecoin-core,myriadcoin/myriadcoin,mruddy/bitcoin,donaloconnor/bitcoin,ericshawlinux/bitcoin,Xekyo/bitcoin,peercoin/peercoin,vmp32k/litecoin,CryptArc/bitcoin,ryanofsky/bitcoin,DigitalPandacoin/pandacoin,MazaCoin/maza,bitcoinknots/bitcoin,jambolo/bitcoin,donaloconnor/bitcoin,ElementsProject/elements,wellenreiter01/Feathercoin,joshrabinowitz/bitcoin,sipsorcery/bitcoin