Basic local display and removal of uploaded dances.
Check that an image is not too long.
Improve handling the database instantiation and initialization.
Use a polling-based cache for the main page's json.
Add HTML doctype and language.
Use a CDN for dance gifs.
Fix extra frame being recorded.

Thanks davean!
Add example config file.
Merge github.com:chromakode/danceparty

Conflicts:
	danceparty/default_settings.py
	danceparty/main.py