Log reason for non-standard transaction rejection
RPC: add getbestblockhash, to return tip of best chain
Remove readme-qt.rst and update documentation for readme-qt.md
Merge pull request #2820 from fanquake/remove-readme-rst

Remove readme-qt.rst and update documentation for readme-qt.md
Merge pull request #2812 from jgarzik/rpcbestblock

RPC: add getbestblockhash, to return tip of best chain
Merge pull request #2743 from jgarzik/reject-reason

Log reason for non-standard transaction rejection