Added ability to specify arguments and environment. Ignored user-specific xcode project files.
Added stdout and stderr arguments. -Heath
Removed debug output unless -verbose is passed.
Made ipad launcher option clearer.
Improved error message output by dumping userInfo dictionaries and walking the NSUnderlyingError stack.
Fixed memory leak.
Ignored Xcode4 files.
Changed to use Xcode 4.3 tools and OSX 10.7
Merge branch 'OSX_10_7_XCODE_4_3'