Support :true/:false for disabled key

Also update snippet to use :true
Merge branch 'master' of http://github.com/textmate/bundle-development.tmbundle; branch 'master' of https://github.com/tbates/bundle-development.tmbundle

# By Michael Sheets
# Via Michael Sheets
* 'master' of http://github.com/textmate/bundle-development.tmbundle:
  Support :true/:false for disabled key

* 'master' of https://github.com/tbates/bundle-development.tmbundle: