Add an rss feed

The app has now an rss feed.

Signed-off-by: Emanuele <feliziani.emanuele@gmail.com>
Minor fixes

Minor fixes to the presentational layer – styles and markup.

Signed-off-by: Emanuele <feliziani.emanuele@gmail.com>
Add error handling with Flash

Add error handling with the sinatra-flash gem.

Signed-off-by: Emanuele <feliziani.emanuele@gmail.com>
Merge branch 'master' of https://github.com/GioSensation/recall