Merge tag '1.1.3' into develop

1.1.3 release
Allow slugs to be unique only per site
Translation and syntax fixes
Make slug editable
Reinstate slug with checks for uniqueness per site
Check for unique slug per site after save
Tests for unique slugs
Testing test
Fix and comment tests
Add check for change in slug
Merge pull request #29 from jbeyers/feature/non_unique_slugs

Feature/non unique slugs
Version bump
Merge branch 'release/1.1.4'