Adding class diagram
Adding class diagram to README.md
Added relationship between BasicShapeAmbient and Shape in UML
Merge branch 'master' of https://github.com/mgiorgio/shapes4learn
Update README.md

Removing colon from the expression example.
Adding analyzers skeletons, AST and Token structures.
Added GUI with code text area, shapes panel and console.
Added UI files
Update README.md
Added support for multi-line code.
Added color support for circles.
Merge pull request #1 from mgiorgio/master

Merge from original repository