Bump version to 0.3.0.
Bump version to 0.3.0.

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