Bootstrapping: Ruby 1.9.3 must be installed
Tutorial Installing Packages: Added link list for further reading
Tutorial Simulate a robot: More explanations for better understanding
Tutorial Virtual joystick: Inserted the correct code for the ruby script
Rock Tutorial Joystick: Grammar fixes
Advanced Tutorials Index Page: Grammar fixes
Added new tutorial: Setting up a robot
Merge pull request #1 from charrius/master

Update documentation Rock tutorials