-Switched engine to Mozilla version Rhino.
-Added skeleton ScriptEngine class for easy scripting and
backwards-compatability
-Added spinner event (Experimental)
-Added window.setTimeout() function
-TODO: Move widget event handlers and possibly styles to JavaScript
library.
Added Function sys.AddJarToClasspath(String file).
Loads jars into the classpath relative to the directory RapidS is in.
Added dynamic Look And Feel swtiching.

Usage: In the body tag, specify theme="JARFILE.jar :
com.stuff.classThatHasLookAndFeel"
Initial modularization attempt, makes things much more split up and less
hacky.  Still need better file names.
Merge pull request #10 from Tribex/modularization

Initial modularization attempt, makes things much more split up.