[Boa Constr] Big patch

[Shane H. <sh...@di...>]

Sorry this patch is so big, but I ended up doing three things:

1) Changing all references to 'model.module' to 'model.getModule()' then
setting it up so that the module is only loaded when the user needs it.

2) Finding and fixing the wxGTK bug that causes a segfault whenever a
DTML document is opened.  It's a stack overflow. 
HTMLSourceView.OnUpdateUI() calls HTMLStyledTextCtrlMix.OnUpdateUI(),
which calls window.Refresh(), which generates another call to
HTMLSourceView.OnUpdateUI().  I commented out the call to Refresh(). 
Shouldn't wxStyledTextCtrl be doing the equivalent of the Refresh()
operation automatically?

3) Reformatting some of the code to look better in emacs.

I wonder if you would consider adding a developer to the project so that
I can just check in the changes.

Shane