Don't turn off + on bluetooth from 10 10
Merge pull request #131 from whitingjp/osx1010

Pairing on OSX 10.10
Update external/hidapi reference to latest upstream
Report update errors in threaded LED writing mode

The reporting is delayed, but better than pretending success.
Cherry-pick a fix from upstream PS3EYEDriver
Add links to EXT device documentation
Add detection for Sharp Shooter's pump action
Fix EXT device report buffer size

This makes the EXT device support work on Windows.