Various Fixes

[dkrasner]

Main Points

Fixing some bugs, tying up loose ends:

• MNU error handler was not working when combining do to with a tell command. Now gets the proper context from the execution stack.
• image width and height were not being routed properly through props, preventing serialization and copying functionality. (@darth-cheney I commented out this line since now this is handled by the combination of inline and class defined css, and everything seems to work. With that line there, the image is resized on load based on what the view thinks is appropriate, screwing up ST width/height props -> css)
• drawing width and height were not being routed properly through props...
• cleaning up various unused methods

(adding language.html <- starting point for our language stack)

this resolve #198 and #200

Play around making images and drawings, saving, loading and copying.

[darth-cheney]

There is a strange issue with preserving the aspect ratio when resizing binary images, as demonstrated by these two screenshots: