First version of kernel.cpp port to Go
Merge branch 'master' of https://github.com/mably/btcchain
Indentation fix
nTxPrevOffset calculation fix
VerifySignature implementation
PoS integration work
update tests
Peercoin: BlockChain PoW blocks acceptance, diff calcs
tests: process first 256 peercoin blocks
comment fix
Merge branch 'mably' into kac

Conflicts:
	chain.go
getStakeEntropyBit, code formatting
some
ShaHashToBig utilization
ShaHashToBig utilization
moved peercoin specific parts to ppc.go
Merge branch 'mably' of https://github.com/mably/btcchain into mably
Merge branch 'mably' into kac
remove errors from ppcutil.go