Fixed Signup url
Multiple lookups datamodel + methods
Adds property review_comment to contribution response
Add fields to category
Multiple lookup admin interfaces
Multiple lookup serialisation
Multiple lookup data filtering
Create filter rules interfaces for multiple lookups
Merge branch 'multiple-lookups' into staging
Change description of automatically created groupings

The description now reads “All contributions of category
{category-name}.”
FIXES #134 Strips HTML tags from all names and descriptions
FIXES #131: Location updates when updating contribution
Merge branch 'master' into staging
Fixed #152: Fields are correctly when creating new fields
Fixes #153: Made creation of grouping for category optional
Implemented search API endpoint
Updated requirements.txt to latest versions
Changed landing page background image
Daily digest draft implementation
Added geography extend field to project model