Use release version
Fix test script
We just need activerecord
Use memory instead of file for sqlite
update .gitignore
Correct dependency version
Add activerecord 3.1
spec_helper little cleanup
drop support for activerecord 3.1
Add optional test for activerecord edge
Add Rubinius to travix matrix
Updated README
Syntax deprecation fix
Formatting
Test for Hierarchy Maintenance
revert syntax change (Not supported in AR3.2)
Readme typo
travis config typo.
Assert valid keys to avoid typos and headaches
Remove deprecated syntax from label spec