Silence warnings on case sensitivity specs because it necessarily operates in memory, which annoys the AR adapter
Divide ActiveRecord adapter into Postgres and MySQL versions
Lock transitive_closure table to prevent simultaneous writes, due to a potential issue where a node acquires ancestors and descendants at the same time
Modified to fix case insensitive sql using arel
Modified to fix case insensitive queries to be database agnostic
Modified to use map
Modified to clean up code
Modified to remove unnecessary ordering
Modified to remove unnecessary ordering
Merge branch 'master' of github.com:mdsol/the_policy_machine into feature/postgres

Conflicts:
	lib/policy_machine_storage_adapters/active_record.rb

Modified to resolve merge conflict
Modified to fix postgres database config
Merge pull request #25 from mdsol/feature/postgres

Modified to implement postgres adapter and...