Updated cocoapods-keys.
Added minimumKeyLength.
Reverted Makefile's  command to use dashes instead of empty strings for stubbed keys.
Updated CocoaPods core.
Added note about problem with .
Updated to version of Artsy+OSSUIFonts that specifies module name of , which will be helpful later.
Merge pull request #342 from artsy/make-oss

@orta => Address problem installing from OSS