Fix IsInitialBlockDownload which was broken by headers first.
[Wallet] Reduce minTxFee for transaction creation to 1000 satoshis
Add a locking mechanism to IsInitialBlockDownload to ensure it never goes from false to true.
Reset setBlockIndexCandidates once block index db loaded
Win32: log addresses found in Discover() calls
Win32: change buffer size for gethotsname in Discover()

- 256 byte is the maximum, as per
  http://msdn.microsoft.com/en-us/library/windows/desktop/ms738527%28v=vs.85%29.aspx
Abstract context-dependent block checking from acceptance
CreateNewBlock and miner_tests: Also check generated template is valid by CheckBlockHeader, ContextualCheckBlockHeader, CheckBlock, and ContextualCheckBlock
TestBlockValidity function for CBlock proposals (used by CreateNewBlock)
miner_tests: Disable checkpoints so they don't fail the subsidy-change test
Abstract DecodeHexBlk and BIP22ValidationResult functions out of submitblock
Implement BIP 23 Block Proposal
QA RPC tests: Add tests block block proposals
submitblock: Check for duplicate submissions explicitly
minor style cleanup after HTTP rest interface merge

- no code changes
[Qt] minor ordering cleanup after new fee selection
Make PruneBlockIndexCandidates safer
CreateNewBlock: Stick height in coinbase so we pass template sanity check
Split up crypto/sha2
Add HMAC-SHA256