Extend _set_where to support more types of arguments
Extend _set_where to support where_in
Merge branch 'master' of https://github.com/zbrox/codeigniter-base-model into feature/smarter_where
Fix where with a string parameter
Added tests for smarter _set_where
Fix - use _database instead of db
Merge branch 'feature/smarter_where' of github.com:zbrox/codeigniter-base-model into zbrox-feature/smarter_where

Conflicts:
	core/MY_Model.php
Merge branch 'zbrox-feature/smarter_where'