[TIMOB-17346] Fixed issues with config.json being overwritten at the same time.

Improved handling of corrupt a config.json file.

Fixed backwards compatibility with Titanium SDK 3.3.0 and older when building an iOS app and Xcode 6 or newer is installed.

Added support for a "helpNoPrompt()" callback when a missing option is encountered.

Fixed bug with abbreviated options that don't have a value being set to true.
Merge pull request #152 from appcelerator/timob-17346

[TIMOB-17346] Fixed issues with config.json being overwritten at the same time.
Version bump.
[TIMOB-17649] Fixed bug where Xcode 6 was not being removed from Titanium SDK 3.3.0 and older from the 'ti info' results.
[TIMOB-17649] Removed Xcode 6 warnings from TiSDK 3.3 and older issues list. Added no supported xcode warning if there's no valid Xcodes found after removing Xcode 6.
Merge pull request #153 from appcelerator/timob-17649

[TIMOB-17649] Fixed bug where Xcode 6 was not being removed from Titaniu...
[TIMOB-17666] Fixed bug where 'ti info' failed when an invalid Titanium SDK is selected.
Merge pull request #155 from appcelerator/timob-17666

[TIMOB-17666] Fixed bug where 'ti info' failed when an invalid Titanium SDK is selected.
[TIMOB-17346] Fixed bug introduced by aaf5cf4a4371aff220e8b02837ad19163e882d71.
Merge pull request #157 from appcelerator/timob-17346

[TIMOB-17346] Fixed bug introduced by aaf5cf4a4371aff220e8b02837ad19163e882d71.
Merge remote-tracking branch 'appcelerator/master'