Merging
Merge branch 'master' of https://github.com/magento-hackathon/entitytype-manager
Entity type changes
Merge pull request #3 from oleg-kravets/master

refactore controller
fixed mass attribute delete action
removed frontend_input_renderer field
Fixed required flags for certain fields on entity type form
Added frontend entity controller
Implement save of entity
- added 'Manage Entities' link to the entity types grid
- added 'Back to Entity Types List' button to the entities grid