First iteration with Readability & SimplePie

- Readability proxy (to extract content)
- SimplePie proxy (to read rss)
- Preview last readable content from a feed (Test parsing)
- Remove image from feed (use google service to retrieve favicon)
- add ability to define a parser for a feed
Add command to fetch items

- fetch items for old or new feed
- list items
- ability to preview item content
- rename routes to add document name inside