Update documentation, add MariaDB support
Implement id_was for rails 4.1.6 compatibility
Merge pull request #236 from tomhughes/id_was

Implement id_was for rails 4.1.6 compatibility
Revert "Implement id_was for rails 4.1.6 compatibility"
Merge pull request #244 from composite-primary-keys/revert-236-id_was

Revert "Implement id_was for rails 4.1.6 compatibility"
Fix for ActiveRecord 4.1.6.  id_was used to be based on attribute_was, but is not a separate method.  Fixes #236.
Fix up require changes for last patch.
Update gem to 7.0.11 and update AR version requirements.
Merge pull request #228 from irobayna/patch-1

Update documentation, add MariaDB support.
fixes failing require and postgres and sqlite3 test delete_all test

* this file composite_primary_keys/active_model/dirty does not exist
* Checking the line exception message is not really ideal as it will
depend on each drivers' implementation
Merge pull request #248 from StupidCodeFactory/fix_postgres_and_sqlite_delete_all_test

fixes failing require and postgres and sqlite3 test delete_all test
Remove singleton classes on CPK relations against Rails 4.1

* Extract CPK methods to its own module and extending instead of opening the singleton class.

* Fix `Marshal.dump`. Makes caching work again.
Merge pull request #252 from nhocki/delegate_rails_41

Remove singleton classes on CPK relations against Rails 4.1