- Added support for 404 error handling page.
- Removed jQuery and Zepto from being compiled. Added pre-minified versions. Some Uglify issues to resolve with Zepto.
- Updated todo
- CSS tweaks
Merge branch 'error404'

* error404:
  - Added support for 404 error handling page. - Removed jQuery and Zepto from being compiled. Added pre-minified versions. Some Uglify issues to resolve with Zepto. - Updated todo - CSS tweaks