Meta tag model creation

* Adds gem to gemfile
* Creates migration for spree meta tags
Meta tag model creation

* Adds routes for meta tag model
* Adds some translations to locales
Meta tag model creation

* Remove meta description container in products form partial
* Remove meta keywords container in products form partial
* Adds meta tags option in configuration menu
* Adds meta tags menu to products
* Adds title_meta_tag helper in shared/header partial
Meta tag model creation

* Creates meta tags model
* Creates admin/meta_tags controller
* Creates base_helper_decorator
Meta tag model creation

* Creates admin/meta_tags#index view
Meta tag model creation

* Rename meta_tags for metatags
* Adds more actions for metatags controller
Meta tag model creation

* Replace extension of overrides from erb to haml
* Change syntax of defaces from erb to haml
Meta tag model creation

* Adds haml-rails to the party
* Change spree version of extensions from 2.3 to 2.2
Meta tag model creation

* Adds more actions to metatags controller
* Adds scope to spree/metatag model
* Adds more translations to locales/en.yml
Meta tag model creation

* Adds more translations for english
* Change routes for products in admin
* Adds more gems in gemspec
Meta tag model creation

* Change metatags controller for inherit from resource controller
* Adds deface to add metatags menu to products
Meta tag model creation

* Change metatags#index to use conventions from spree-2-2
* Change metatags#new to use conventions from spree-2-2
* Creates metatags#edit view
Meta tag model creation

* Adds spec/dummy application
* Updates .gitignore file
Meta tag model creation

* Adds decorator for spree/base helper
* Adds routes for metatags in products
* Adds some not useful files
Meta tag model creation

* Remove all spree images from public
* Remove log from gitignore
Meta tag model creation

* Adds files to .gitignore
* Remove sqlite db
Meta tag model creation

* Change spree metatags table's fields
* Change locales for spree metatags
Meta tag model creation

* Replace validations in spree/metatag model
* Change attribute's names in spree/admin/metatags/_form partial
* Change attribute's names in spree/admin/metatags/index view
Meta tag model creation

* Remove overrides for admin/products views
* Change method in add_title_meta_tag override
Meta tag model creation

* Creates factory for metatags
* Adds specs for spree metatag model
* Adds requires for factories and shoulda matchers