Add Boost-iostreams to Travis testing
Add Boost-iostreams to Travis testing

ulricheck/hunter,ikliashchou/hunter,ingenue/hunter,NeroBurner/hunter,designerror/hunter,designerror/hunter,ulricheck/hunter,headupinclouds/hunter,daminetreg/hunter,tatraian/hunter,ulricheck/hunter,ledocc/hunter,ruslo/hunter,xsacha/hunter,ThomasFeher/hunter,ErniBrown/hunter,vdsrd/hunter,x10mind/hunter,zhuhaow/hunter,ThomasFeher/hunter,stohrendorf/hunter,ikliashchou/hunter,isaachier/hunter,vdsrd/hunter,headupinclouds/hunter,designerror/hunter,x10mind/hunter,ruslo/hunter,NeroBurner/hunter,dan-42/hunter,ingenue/hunter,headupinclouds/hunter,vdsrd/hunter,NeroBurner/hunter,xsacha/hunter,alamaison/hunter,madmongo1/hunter,RomanYudintsev/hunter,stohrendorf/hunter,mchiasson/hunter,dvirtz/hunter,shekharhimanshu/hunter,fwinnen/hunter,ikliashchou/hunter,dmpriso/hunter,madmongo1/hunter,daminetreg/hunter,jkhoogland/hunter,tatraian/hunter,fwinnen/hunter,xsacha/hunter,Knitschi/hunter,dan-42/hunter,isaachier/hunter,NeroBurner/hunter,madmongo1/hunter,pretyman/hunter,caseymcc/hunter,ErniBrown/hunter,mchiasson/hunter,RomanYudintsev/hunter,shekharhimanshu/hunter,ingenue/hunter,zhuhaow/hunter,ErniBrown/hunter,pretyman/hunter,jkhoogland/hunter,fire-hunter/hunter,stohrendorf/hunter,alamaison/hunter,x10mind/hunter,fwinnen/hunter,mchiasson/hunter,caseymcc/hunter,jkhoogland/hunter,pretyman/hunter,akalsi87/hunter,akalsi87/hunter,akalsi87/hunter,tatraian/hunter,sumedhghaisas/hunter,isaachier/hunter,dmpriso/hunter,ledocc/hunter,ikliashchou/hunter,sumedhghaisas/hunter,Knitschi/hunter,ruslo/hunter,fire-hunter/hunter,ThomasFeher/hunter,madmongo1/hunter,zhuhaow/hunter,RomanYudintsev/hunter,ingenue/hunter,alamaison/hunter,lucmichalski/hunter,ErniBrown/hunter,mchiasson/hunter,xsacha/hunter,dan-42/hunter,dvirtz/hunter,dan-42/hunter,lucmichalski/hunter,ledocc/hunter,pretyman/hunter,caseymcc/hunter,shekharhimanshu/hunter,lucmichalski/hunter,ruslo/hunter,isaachier/hunter,dvirtz/hunter,dmpriso/hunter,fire-hunter/hunter,Knitschi/hunter,daminetreg/hunter,sumedhghaisas/hunter