Switched to Foundations Base 64 encoding.
New activity icons
Merge pull request #42 from mattbischoff/base-64-take-2

Switched to Foundations Base 64 encoding.
Remove deprecated documentation directive
Protocol can't have underscores in it
Prevent against crashes due to inserting nils into dictionary literals
Remove unnecessary nil checks, clearer mutable dictionary initialization
Merge pull request #49 from tumblr/literal-nil-crashes

Prevent against crashes due to inserting nils into dictionary literals