Changed TimingData Lua API to not return strings that will be immediately be parsed into numbers.
Updated documentation to match API changes.
[WIP] Update to Mac OS X 10.9 SDK

Untested Parts
--------------

`ArchHooks_MacOSX::DumpDebugInfo()`

- Used `sysctlbyname` to find the Mac OS X version instead of the deprecated `Gestalt`.
    - http://stackoverflow.com/questions/11072804/how-do-i-determine-the-os-version-at-runtime-in-os-x-or-ios-without-using-gesta

`MemoryCardDriverThreaded_MacOSX::Unmount( UsbStorageDevice *pDevice )`

- Updated to use `sync_volume_np` instead of deprecated `PBFlushVolSync`.
    - http://lists.apple.com/archives/carbon-dev/2010/Nov/msg00030.html
Added metric for controlling whether TimingData returns numbers instead of strings.
Updated TimingData docs.
Forgot about the AsNumbers unseen version that default was trying to use.
add distinct coin input debounce preference

This commit adds a preference, DebounceCoinInputTime (defaults is 0), which allows coin input to be debounced via a float value separate from other input.
Removed DefaultFail GamePref and reinstated DefaultFailType real preference.  Should fix default fail related problems.
MusicWheel highlight improvements
ScreenDebugOverlay improvements
Font improvements
SelectStyle, SelectMode improvements
ScreenCaution improvements
Arcade improvements
fix a small error in ScreenNameEntryTraditional underlay
fix another small error in ScreenNameEntryTraditional underlay
Merge branch 'theme-updates' of https://github.com/Midiman/stepmania
Fixed SSM StageDisplay to update when the song changes and SG StageDisplay to fetch curStage at the correct time to set its color.
OptionsCustomizeProfile, HeartEntry improvements
Merge branch 'theme-updates' of https://github.com/Midiman/stepmania