GeometricRecognizer : Implemented and tested

Mega-Commit (sorry about that..) : GeometricRecognizer corrected and
tested correctly, 80% tested (sonar numbers). Added the resources
folders, with gestures and a test folder. Uncomment some instructions
in others classes like in Category, who was waiting for the
geometricRecognizer class implementation. Don't forget to consider the
resources folder these sub-folders as packages, if you want the
getResourceAsStream working properly.
Add .DS_STORE in .gitignore (Mac user…)