Some remarks to improve documentation

[remyzorg]

• Language documentation
  • Call Documentation "Syntax"
  • Information about the single syntax elements especially the statements.
  • General informations like how the JS events and Pendulum signals interact.
• Web based Esterel engine : an input/output area like reacting on simple mouse clicks
  with a simple source text field.
• Comments : More educational comments in the code of the examples.

(Thx Ben for those remarks)