Add null user exception to ComposePrivateMessage
Merge pull request #26 from eyarham/patch-1

Add null user exception to ComposePrivateMessage
Fix GetUnreadMessages to support comments
Minor tweaks
Added rate limit exception, improved comment
Add workaround for Reddit API being shitty
More special handling for Reddit's API being shitty
Fixed problems with GetComment
Wrap in try...catch to avoid more Reddit API shit
Merge remote-tracking branch 'upstream/master'