Change GAE tools
Major html/js refactoring

- Add favicon
- Move images to subfolder
- Add virtualenv to gitignore
- Add encoding to python src
- Produce JSONP in Readability-compatible format
- Add backlink to home page
- Minor sass style fixes
- Add flag to settings to include non-minified js
- Major javascript refactoring:
    - Parser dictionary by name instead of plain array
    - Unified parser handling
    - Default article content is processed as the regular one
    - Proper exception handling
    - More logging
Fix icon fonts

Use official 'entypo' font from http://www.entypo.com