V2.2

Mostly cleanup.

- -saveContext now returns an __NSError__ if there was one, and NOT a "success" BOOL. This is major since you may have to flip conditionals on this method
- Change NSString *appURL to NSURL *rootURL, also:
- appUsername to basicAuthUsername
- appPassword to basicAuthPassword
- appOAuthToken to oAuthToken
- Remove categories for easier linking
- "Logging" define is no longer a `#define` and is done through NSRConfig
- New folder structure