Internalize Readability

Following great update from https://github.com/Dither/full-text-rss
Update namespace
New attempt to fix encoding
Add tests on CompilerPass
Add some tests to Readability
Merge pull request #34 from j0k3r/internal-readability

Internal readability
Use Symfony LockHandler
Create .stage1.yml
Use a different way to start mongo
Update .stage1.yml
Add npm, bower & gulp
Remove bower