Cookbook refactored
Merge pull request #25 from lewagon/cookbook-refactored

Cookbook refactored
Rakefile to check file exists
Count lines to validate exercise
Rakefile testing CSS file size
All CSS exercises tested
Invert arity
Test bootstrap grid exercise
Need 3 html files
Empty 0/0 tests for JS exercises
New link to WWW Sql Designer
Recompartiment Chapter 3
Fixed the readme to go along the api changes
Fix conflict with teacher
WIP on 01-Ruby chapter
Merge master
Solution for survery exercise