Task 47 permissions

[mattiagiupponi]

With this PR I want to:

• Add .gitignore (always useful)
• Clean-up commented code.
• Fix README
• Manage set_workflow_perms for new resources.

The main code is the following one:

geonode-csw-services/csw_services/models.py

Lines 107 to 108 in ada4128

	for r in resources:
	r.set_workflow_perms(approved=True, published=True)

I also add a check for the resource if exists (in order to avoid runtime issues)

geonode-csw-services/csw_services/models.py

Line 77 in ada4128

if resources.exists():

Now if the resources exists will do the update of the csw otherwise will log an error