Merge pull request #72 from torokmark/master

Added several gems like seed_fu, dropbox-api or faker
fix: add Configuration section to main menu
Add Decorator: Draper.
Add Misc: Virtus.
Add Natural Language Processing: Treat.
Added websocket-rails
Merge pull request #76 from Erol/treat

Add Natural Language Processing: Treat.
Merge pull request #75 from Erol/virtus

Add Misc: Virtus.
Merge pull request #74 from Erol/draper

Add Decorator: Draper.
Merge pull request #78 from luizkowalski/master

Added 'websocket-rails'
Add Abstraction: Interactor.
Merge pull request #77 from Erol/interactor

Add Abstraction: Interactor.
HTML Parsing => HTML/XML Parsing
add Data Visualization section