Version bump to 1.0.0
Version bump to 2.0.0
Version bump to 3.0.0
Version bump to 4.0.0
Mods to work with rails 4 without upgrading sunspot to 2.1.0
Mods to work with rails 4 without upgrading sunspot to 2.1.0
Regenerate gemspec for version 4.0.0