added tabs logic to locality form

Issue #74
material design guidlines tryout
Merge remote-tracking branch 'origin/form-render' into material
added a bit of styling to edit form
Fix missing changeset when working with admin

Closes #93
Merge pull request #94 from dodobas/develop

Fix missing changeset when working with admin
Create symbolic link to the REQUIREMENTS.txt
Add missing specification model tests
Be extra meticulous about model fields
Add django-pg-fts and LocalityIndex model
Add fts_rank to the specification and tests
Reverted botched up LocalityArchive test
Add SIG_locality_values_updated signal and handlers
draft of new modal
added twitter shareing
added twitter for main site
moved about page
direct linking for sites
Add initial map_clustering and tests
natural language form