Support OS X 10.10

Hi Elia,

the following commit adds support for OS X 10.10 to the bundle. I tested all commands under OS X Yosemite Beta 3 and TextMate 2.0-alpha.9565. They all seem to work fine.

By the way: Do you have an example text snippet to show the correct behaviour of “Align column assignment”. The documentation for the command is the same as the one included in the Source bundle, but while I am able to align the following text with the “Align column assignment” command provided by the Source bundle, the command included in this bundle does not seem to align anything at all.
    
    1 + 1 = 2
    10 + 10 = 20

Kind regards,
  René
Yeah, you are right. Sorry, it seems that I did no test the changes thoroughly enough. I also forget to update the “Open project .tm_properties” command. I will try to amend the commit in the pull request accordingly.