Set git branch for DM deps in Gemfile
Version bump to 1.2.0.rc2
Version bump to 1.2.0
Bump version to 1.3.0.beta
Remove jeweler
Remove VERSION file
Fix version file
Change NoFixtureExist to inherit from StandardError, not Exception

* By using Exception as a base class it makes it impossible to rescue without
  specifying a matching exception class
Fix comment spelling mistake
Merge branch 'master' of https://github.com/datamapper/dm-sweatshop