Setup generator, and spree_auth_devise and spree_core to work with spree 2-2-stable
Puts spree gem before than using auth_devise to solve problem with partials
Removes file required that doesnt exist
Implements new calculator and promotion for specific product with option
values

- Adds javascript option picker for admin section
- Adds required migrations
- Adds Calculator, rule and actions for this new promotion type
- Loads new classes for spree application
- Adds a new endpoint for option values
Merge branch 'master' into 2-2-stable

Conflicts:
	Gemfile
Merge pull request #1 from heridev/2-2-stable

set as master the branch 2-2-stable