Version fix - fixed version blockchain sync

Allow 0.8.5.3 clients to send blockchain to v0.8.7.1 clients.
Merge pull request #2 from fastcoinproject/fastcoin-8.7.2

fastcoin-8.7.2
Merge pull request #16 from m0gliE/fastcoin-8.7.2

Staging updates for Fastcoin 8.7.4