Initial Commit
Podfile and first methods

getArtistInfo
First successful request

AFLastFmAPIClient added

canceling doesn't work yet
Canceling work

Refined the canceling mechanism after reading up on it. Made appropriate comments.

I made it that completion block DOES NOT get called if the operation was cancelled.

Single operations can be cancelled.
Error Code according to Last.fm
Adding more artist.getInfo keys, adding other constants for params generation
keys management, new category

Added an NSDictionary for easier access to the Last.fm JSON data

updated image keys

moved "boring" methods to the bottom
Added README warning for GitHub push