Merge pull request #160 from specialbrand/1.0

Added ability for super admins to login as another user
added on_create MY_Model hook documentation
specified the table name explicitly in the get_others query when specifying the key value for the option
Merge branch '1.0' of github.com:daylightstudio/FUEL-CMS into 1.0
added language file detection for blocks
added ability to specify a default language when generating navigation items
fixed default permissions for simple modules to include create, edit, publish and delete
Added "LOGIN AS" documentation
fixed some regression issues with earlier permission fix
removed extra create_simple_permissions method call on generate controller
fixed issue with path when looking up view block files in different languages
added is_valid method to Fuel_language
fixed issue when no edit, delete, or view permissions are assigned and the list item rows are still clickable
added default documentation page for generated advanced modules
Fixed Curl class to remove blank error messages (successful CURL session)
Added namespaced cookie name for fuel language selection
added default documentation generation for advanced modules
fixed potential block error when looking for language file
minor comment spelling fix for Fuel_page initialize method
updated has_many and belongs_to generated form fields to use the short_name for the module value that it is linked to