Update Travis to test against golang 1.4.2
Update Travis to test against golang 1.4.2

btcsuitereleases/btcd,jcmincke/dcrd,danoctavian/btcd,cjepson/btcd,davecgh/btcd,dan-da/btcd,jimmysong/btcd,cqswxj2013/btcd,Roasbeef/btcd,cqswxj2013/btcd,jimmysong/btcd,ppcsuite/ppcd-old,decred/dcrd,runeaune/btcd,jrick/btcd,runeaune/btcd,stevenroose/btcd,glv2/ppcd,wallclockbuilder/btcd,dan-da/btcd,hectorj/btcd,Stash-Crypto/btcd,ppcsuite/ppcd,dajohi/btcd,danoctavian/btcd,jongillham/btcd,Dirbaio/btcd,adiabat/btcd,jrick/btcd,ltcsuite/ltcd,toddfries/btcd,1d4Nf6/btcd,aakselrod/btcd,ltcsuite/ltcd,dajohi/btcd,jcmincke/dcrd,decred/dcrd,jrick/btcd,dajohi/btcd,btcsuite/btcd,ppcsuite/ppcd-old,toddfries/btcd,hectorj/btcd,jongillham/btcd,mathiasrw/btcd,Cleawing/btcd,soapboxsys/ombfullnode,aakselrod/btcd,pkothbauer/btcd,davecgh/btcd,Roasbeef/btcd,Dirbaio/btcd,cjepson/btcd,mathiasrw/btcd,tb00/btcd,adiabat/btcd,BitGo/prova,pkothbauer/btcd,btcsuite/btcd,qchain/btcd,qchain/btcd,btcsuitereleases/btcd,jrick/dcrd,CryptocurrencyCabal/htcd,BitGo/prova,soapboxsys/ombfullnode,DanielKrawisz/btcd,1d4Nf6/btcd,wallclockbuilder/btcd,Stash-Crypto/btcd,jrick/dcrd,tb00/btcd,glv2/ppcd,ppcsuite/ppcd,CryptocurrencyCabal/htcd,Dirbaio/btcd,DanielKrawisz/btcd,jcmincke/dcrd,Cleawing/btcd,stevenroose/btcd