Merge pull request #478 from adobe/jeff/yosemite-traffic-lights

Enable Yosemite Native Traffic Lights on OSX 10.10
Merge branch 'master' of https://github.com/adobe/brackets-shell
Merge branch 'master' of https://github.com/adobe/brackets-shell
- accept 1.0 version number for set-release task
- some cleanup based on review feedback
Merge branch 'master' of https://github.com/adobe/brackets-shell
- merge with master and resolve conflicts
- some minor tweaks based on review comments
- specify the same version range for semver that we use on brackets (~4.1.0)
Merge pull request #485 from adobe/ingo/fix-set-release-number-appshell

accept 1.0 version number for set-release task