Major upgrades (could use more testing)

- Python 3 (only)
- Django 1.9
- Upgrade frontend deps
- Improve static file handling

.gitignore

@@ -1,8 +1,11 @@
 *.swp
 *.pyc
 local_settings.py
-venv
-.idea
 db.sqlite3
-node_modules
-.sass-cache
+venv/
+.idea/
+node_modules/
+bower_components/
+.sass-cache/
+staticfiles/
+