Fixed install instructions

test_data.json is under /fixtures/auth/
Minor update to installation document
Merge branch 'master' of github.com:feroda/gasistafelice
Install guide

Rearranged install guide. Now there are three differetn guides:

* prerequisites (needed by both the following guides);
* user install;
* developer install.
GF backup guide.

Step by step howto to restore GF database linked to a particular commit.
The restore can be done trought a script file placed in <GF_DIRECTORY>/extra/backup_db.sh.
Disabled notifications (For the moment).

To restore when django_notification will be updated.
Merge branch 'master' of github.com:feroda/gasistafelice
Updated UPGRADE procedure to 0.9.9.9
Adjusted some requirements to avoid unsupported updates of packages
TEST view for bug #214

it will be useful later when we will solve it...
Implemented TolerantDecimalField.

Now the field accepts both dot and comma as decimal separator.
Removed "Can add person" permission from fixtures

Avoid "+" near "Person" on "Add Gasmember Form". FIX #212
FIX #214: unicode rendering for ParamRole model

* .gitmodules: updated submodule django-flexi-auth to feroda repository (forked from seldon)
* submodules/django-flexi-auth: upgraded to commit
* requirements.txt: updated link to django-flexi-auth feroda fork

To update, you need to reinstall django-flexi-auth submodule.
In your (virtual)environmend it should be enough to write:

pip install -U -e git+https://github.com/feroda/django-flexi-auth.git#egg=django-flexi-auth

Conflicts:
	requirements.txt
Fixed call to formset_class -> pass "data" to instance for bound forms
Manage roles for Supplier in supplier_details.py!

* Eliminata l'assegnazione dei ruoli per il fornitore nella gestione ruoli
  del GAS.
* Aggiunta la gestione ruoli nella scheda fornitore dove è possibile
  assegnare una qualunque persona del DES che abbia un utente in Gasista
  Felice
FIX #209 - it "should" be fixed

WARNING: we say "should" because we have been not able to reproduce
exactly the bug. But we have verified that commenting the evaluation of
<script> tags in form popup retrieved, implies that bug (seems) to never
happen.

It could be "bug-prone" if there are <script> tags outside <form> tags
in the html retrieved for building the popup

Anyway we are satified of the work :)
Fix to not show the "EDIT" button in a resource details block if the edit form is not implemented
Deleted duplicated gasmembers property
Fix bug #216

Fix error introduced in f4b1ad6b
Fixed "got an unexpected keyword argument 'on_site'" error on notify_order_state_update signal.

Removed 'on_site' keyword argument from the notify_order_state_update signal notification send. Added 'on_site' to the signal 'extra_content' instead.