Switching to pod based test target
Adding NSData utils.
Use NSStringWithFormat from Objective Sugar instead of GHStr.
Adding GHNSError macro.
Adding to_JSON methods.
Removing seconds and millis from utils category (unnecessary).
Accessors with class check.
Added border clippable check.
Image scale helper.
ISO6801 date formatter fix. Now accepts +XX:YY for time zone.
More tests.