Mac support for menu sections.
Windows support for menu sections.
Update JSDoc comment
Merge remote-tracking branch 'origin/glenn/menu-sections' into glenn/menu-sections
Better error handling on mac.
Error handling for 'before' and 'after'.
Better error handling when adding menu items on Windows.
Merge branch 'glenn/menu-sections' of https://github.com/adobe/brackets-shell into glenn/menu-sections
Simplify return logic.
Simplify return logic.
Cleanup boolean tests
Merge pull request #186 from adobe/glenn/menu-sections

Add support for "firstInSection" and "lastInSection" when adding menu items