Use scripts instead of entry_points
We can boot the server now
Move assets out
Update assets in templates
Fix templates, use static_url instead of cnd_static_url
revert c1c9c8d, still use entry_points
1. Development server with DEBUG enabled.
2. Fix cdn_static_url in templates
3. Add defaults source
use werkzeug.utils.import_string instead of polaris.utils.import_string

https://github.com/eleme/polaris/issues/5