add versioning back
add migrations for paper_trail
Merge branch 'feature/versioning' into development

* feature/versioning:
  add migrations for paper_trail
  add versioning back
fix failing tests for rails 3.0
bump version to 0.0.3
Merge branch 'release/v0.0.3'

* release/v0.0.3:
  bump version to 0.0.3
  fix failing tests for rails 3.0
  add migrations for paper_trail
  add versioning back