base report bits for @davea to work his MySociety magic.
Merge branch 'master' into feature/report-tools

Conflicts:
	observations/urls.py
	observations/views.py
Don't force local_settings to implement post_import
Add postcode lookup to map
Remove superfluous comment
Merge pull request #39 from openwater/feature/report-tools

Add some more location awareness for users browsing reports