Right Cmd to Alt function
Remove obsolete files
Use Keyboard(Special)EventCallback internally

Otherwise it will crash on 10.9.
Migrate to latest Xcode and build for >=10.6
PackageMaker.app is no longer in /Developer

It isn't really shipped with Xcode available with MAS too. So just for now use
one extracted from most recent auxiliary tools `xcode44auxtools6938114a.dmg`.
Multi-line label fits better in 10.9 prefs
Bump to 1.7.0 since 1.6.9 is blacklisted on 10.9
Remove obsolete hack file
Add myself to copyrights
Make version update to update version correctly

When including myself in copyrights.