edx/configuration — pull request #422 by jarv (2013-11-05 14:47:17+00:00)
Title: fixing default for THEME_NAME

@feanil @antoviaque

If THEME_NAME is set to an empty string it will cause a sass error due
to this mako code:

```
% if env.get('THEME_NAME') is not None:
// import theme's Sass overrides
@import '${env.get('THEME_NAME')}';
% endif
```