[fixes #107] Adds a success message after creating a new data request
Merge pull request #126 from openrural/feature/107-request-message

[fixes #107] Adds a success message after creating a new data request
[codereview refs#110] fixed imports and indentation.
Merge remote-tracking branch 'origin/master' into feature/105-request-page

Conflicts:
	opendata/requests/views.py