Adding .bundle, .ruby-version, and .ruby-gemset to gitignore
Removing extra rake gem declaration
Merge pull request #1 from bsedat/gemfile-cleanup

Gemfile cleanup
Switching to use Appraisals to manage differing sets of gems for various versions of ActiveRecord
Merge pull request #2 from bsedat/appraisal

Switching to use Appraisals to manage differing sets of gems for various...
Removing rubygems require and activerecord gem installing from test_helper
Formatting fix for appraisal in gemspec