Added search field to Principal param role relations admin interface.
Fixed Orly test#A -> this error is a print left in code!
Idempotent `register_workflow` method, and get_or_create account

Needed because in tests, the syncdb seems to be done twice
(so we have two post_syncdb)

My fault has been done in merging :( Merged worklow work along with
simple_accounting work.

Rebase would not work
Documentation to integrate new features for accounting improvements
Dawn indentation fot InterGAS form Metaclass
Redo home pagine
Added gas templatetags
Copy meta fieldset for open orders form.

Fixes: Caught KeyError while rendering: "Key 'intergas' not found in Form"
Updated InterGAS translation
Trivial improvement on html des_notification
Unabled notification.

It will be restored when django_notification is updated.
Fixed bug in workflow: using translated terms instead of constants.
Removed initial_data fixtures.

Made some changes on the tests to match with the last commits (ongoing).
Renamed the GF exceptions.py file to gf_exceptions.py.

All the imports from other files (only one) have been changed accordingly.
Modified GF exceptions file.
Fixes small bugs on order opening notification and gas manager.

- added exception to handle the case in which the opened order referrer was None
- keyword argument passed as a non-keyword argument to the function collecting gas-member referrers
Fixing tests, adding fixtures to load data.

Last commit on django-simple-accounting: d25ee37651371e00f97a2e6b412f4037f673f21f
Merge remote-tracking branch 'origin/matteo-dev'

Conflicts:
	gasistafelice/gas/tests.py