Merge pull request #32 from subimage/feature/improve-image-call

Allow fetching more than 15 images (the default)
Merge pull request #33 from subimage/feature/add-artist-genre

Allow fetching of Artist Genre
adds gem signing
bump version
whoops
Added top_hottt method to get hottest artists.

Also cleaned up some dupe code by refactoring VCR calls in spec.

Tweaked guard file to get autorun working again on my system. For some
reason the previous config wasn't re-reunning specs on file
modification.
Tweak spec to work with new format VCR options