BugFix:  Issue 23 -- from xxx import * fails

Define the importStar function to add all symbols in a module to the proper environment.
Add Sk.globals to initialization code...

I think this should enable us to write the globals() function.  But I've got to do a lot more testing.  In the meantime it serves an important purpose for the experimental processing module. (That is the wrapper for processing-js)
Proof of concept for wrapping processing-js
Remove generated file dist/builtin.js to avoid merge conflicts.