Add creationDate, updatedDate, and body to issue comments.
Add tests for OCTIssueComments
Add the body property to pull request comments.
Add a protocol for comments.
Add a protocol for comments on diffs (commit or pull request).
Style fixes, synthesize props from the protocol, add docs, add to public header.
Make OCTComment.h public on both iOS and Mac.
Spelling fixes
Specify instance variables for synthesized properties.
Merge pull request #110 from jacksonh/commentProto

Add protocol for comments