add debug version of game

This version won't use obfuscated Javascript to speed up development.
move source code back into appengine folder

I'm moving back all source code into the appengine folder to avoid
having to "recompile" to see changes. So remove all the copying from the
src folder to the appengine folder from the Makefile and update the
debug.html template to be roughly the same as index.html.
remove template code duplication

This duplication was removed to really setup a top level blockcillin
package rather than save a couple lines.