- Defining the LOGIN_URL constant in config. Defaulting to 'login' for backwards-compat.
- Switching all hard-coded references to 'login' or '/login' to use the LOGIN_URL constant
Use LOGIN_URL constant in routes config
Merge pull request #914 from itsravenous/constify_login_url

Convert login URL to constant
Updated the model file created by the module builder to include additional utility class vars provided by BF_Model.
Merge branch 'develop' of github.com:ci-bonfire/Bonfire into develop

# By Tom Jenkins
# Via Lonnie Ezell (1) and Tom Jenkins (1)
* 'develop' of github.com:ci-bonfire/Bonfire:
  Use LOGIN_URL constant in routes config
  - Defining the LOGIN_URL constant in config. Defaulting to 'login' for backwards-compat. - Switching all hard-coded references to 'login' or '/login' to use the LOGIN_URL constant
Module Builder's model now creates the $validation_rules array so it is ready to do form_validation within the model.
Module Builder - remove validation rules from controller.