Added the first draft of Model and Relations classes
Changed the relation name for model
Improvements to the Model and Relations class
Do not save related values in source table
Use the reference field name instead of ID
The relations are now cached
Support the record copying. Added the revision table hook
Delete the related records also when deleting an entry in related table (see #36)
Added the relations model docs
Make sure the DCA is loaded
Added some useful relations model methods
Updated the README file
Use the haste::call where possible
Merge branch 'feature/table-relations' into develop