Dynamic Methods

As long as Firefox has discontinued logging parameters when
a function call crashes.  We have implemented:

  1. JavascriptSource to fetch, via AJAX, the source code of a file.
  2. CodeBlockFinder: a pushdown automaton to parse code.
  3. Refactor Exception to use this two classes. It's pending to
     handle all possible parameters (closures, in particular).
  4. Make an example using World#new_boid_as_XXXX
  5. Change Boid to accept:
      1. A configuration block
      2. Inheritance.
  6.- Changes in Gate are made to put event driven programming under
      the control of lluvia Project