initial work on an :active_record datastore
specs for active_record datastore and a couple fixes
rethinking the idea to integrate caching, leaning towards :active_record_with_memcache, :active_record_with_redis for implementing the caching layer if wanted
:active_record_with_memcache datastore, specs, setting up the dummy app sqlite db for active_record specs
adding specs to check the cache and database explicitly for active_record_with_memcache
update readme for :active_record and :active_record_with_memcache
Merge pull request #3 from markrebec/active_record

ActiveRecord and ActiveRecordWithMemcache datastores