some fixes with domplate
Add some tags and modifications on lib/dom.js
Begin writing Unit tests for lib_rewrite
integration of Simon's remarks + continue with Arr tests
Css.hasClass should return null if the className is null
little fix for Dom.getElementsByAttribute

Conflicts:
	extension/content/firebug/lib/dom.js
merge with master
fix FBTest can't be run on this branch
add FBTests for lib/dom.js
bring corrections to the lib/array.js FBTest
reset Arr.extendArray as before + some comments
add correction to appendInnerHTML
rewrite Dom.isNode, Dom.isElement and Dom.hasChildElements
add some more tests to lib/dom.js
other little fixes for lib/dom.js
add other corrections for the FBTests of lib/dom.js
improve Obj.extend
revert previous modifications made on lib/fonts.js
add another test for Arr.extendArray