- Do not display anymore the identifier field in home.
- Let the user enter the id if the slug generated from project name already exists as a project id.
- Moved get_billform_for from 'utils' to 'forms', to avoid issue (was 'from forms import ...' into utils,
and 'from utils import ...' into forms, which causeed an error).
This is mainly because 301 is cacheable whereas 303 (See other) isn't.
The redirect response given by the app when trying to connect to a project
(via /project_name) while not authenticated was to permanently redirect to
/authenticate.
Once authenticated, the browser was redirected to the /project_name, that was
cached, leading to an endless loop.
303 see other allows to solve this problem.
* web.py contains the controllers (also called views) + url definitions
* models.py contains the models
* forms.py contains the forms
* utils.py contains a set of utility fonctions to ease the dev. process
