[Platform] Require a name on initialization

Closes #305.

* 'develop' of github.com:CocoaPods/CocoaPods:
  Rubinius on Travis does not seem to pickup the UTF8 default external encoding.
  No need to run `pod setup` manually. Closes #315.

Closes #304.

Switching to `json` because `ASIHTTPRequest` contains subspecs which are confusing for an illustrative purpose. 

v0.6.0rc2

Paths that contain or are contained by an used path are now preserved.
The new logic works well with used path that are directories.

Closes #300

* master:
  Label status images and added CocoaPods/Specs status.