Ensure we don't store complex objects to avoid marshal/encoding version incompatibilities
Force UTC time for tests
remove lock files

Conflicts:

	gemfiles/activerecord_2.3.gemfile.lock
	gemfiles/activerecord_3.0.gemfile.lock
	gemfiles/activerecord_3.1.gemfile.lock
	gemfiles/activerecord_3.2.gemfile.lock
lock shoulda
Fix shoulda-matchers dependency
Merge pull request #4 from zendesk/eac/raw_attributes

Ensure we don't store complex objects to avoid marshal/encoding version incompatibilities