Added a black and white menu bar icon and preference to use it, defaulting to current, color icon ala Dropbox.app. Also cleaned up the .gitignore to ignore CocoaPods stuff, as like rubygems, it's best to keep these files out of source control.
Merge pull request #1 from jakemarsh/master

Added a black and white menu bar icon and preference to use it, defaulting to current, color icon ala Dropbox.app