Add two unittest-related files to .gitignore
Add coverage for all invalid ops

0xba thru 0xff
Test canonical prunable txout format explicitly
make vRPCCommands comment match property names
CRPCCommand.unlocked -> CRPCCommand.threadSafe

unlocked could be confused with wallet encryption
Merge pull request #2348 from freewil/crpccommand-table

make vRPCCommands comment match property names
Merge pull request #2337 from petertodd/gitignore-test-files

Minor: Add two unittest-related files to .gitignore
Merge pull request #2336 from petertodd/invalid-opcode-coverage

Explicitly unittest the canonical prunable txout format
Fix signed/unsigned comparison warnings
Shutdown cleanup prep-work

Create a boost::thread_group object at the qt/bitcoind main-loop level
that will hold pointers to all the main-loop threads.

This will replace the vnThreadsRunning[] array.

For testing, ported the BitcoinMiner threads to use its
own boost::thread_group.
Rename util.h Sleep --> MilliSleep

Two reasons for this change:
1. Need to always use boost::thread's sleep, even on Windows, so the
sleeps can be interrupted (prior code used Windows' built-in Sleep).

2. I always forgot what units the old Sleep took.
LoopForever and ThreadTrace helpers
Port Thread* methods to boost::thread_group
Clean up shutdown process
Only MapPort if USE_UPNP defined