Merge branch 'master' of https://github.com/mably/btcchain
Removed useless ChainTrust code
No fees to reward miners in ppcoin
Mint and money supply calculations
GetCoinAge methods
GetMinFee and MoneyRange methods implemented
GetCoinAge: fetch txs from mainchain
Revert "make this test pass"

This reverts commit 31ffbcd18bcafd0f3b0b7854327294d43027d538.
Duplicate constant COIN removed, already in ppc.go
Moved checkBlockProofOfStake in maybeAcceptBlock to avoid possible unneeded checks
Removed useless ChainTrust code
No fees to reward miners in ppcoin
Mint and money supply calculations
GetCoinAge methods
ppc: few fixes and checks
ppc: enforce transaction fees for every block
ppc: checks: wrong coinstake position
ppc: checks: empty coinbase output and coinstake timestamp
ppc: checks: block timestamp and signature
ppc: limited stake duplicity check