Status Management.
 + Move Account, groups, membership 's status mechanism to static.
 + Update forms accordingly.
Membership management
    + Add function to deal with PENDING request
    + Display membership status from group's view
    + Display role level from group's view
    - Add commented link to request membership.
Add optional param "status' to EndPoint API /people
Only request to add new team to github if group has been bound to github.
Return saved LicenseAgreement object with incremented id.
Project wide pep8 fix
Drop the update_people method as commits need to happen elsewhere
Add a method to flush the db session in the register
Add the url where the application is deployed in the configuration file
Add some configuration keys for email notifications
Add a dedicated form to create new account on FAS
Add a token generator in the fas.utils module
Add email settings in prod

Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>
If no user are found, return a 404 page and give an error message
Add logic to create new accounts on FAS
Add links in the home page to the page to create a new account