Add errormessages module to C makefile
Remove remaining "none" references from C
Clarify tarball-bootstrap instructions
Report module of lines in errors and backtraces
Track module/stack trace across exceptions in JS
Produce backtraces in same format in JS as in C
Trigger JS recompilation when module name changed
Save version/revision in minigrace.js
Show source lines in JS backtraces as in C
Report lines more accurately in JS
Report method/object definition sites more clearly
Wrap method list in C lookup errors
Add "debug" mode to JS, exposing stack frames

When the Debug checkbox is set, or -XDebug passed to the compiler, the
JavaScript backend will track local variables and retain them for
presentation to the user when an exception occurs.
Expand asDebugString definitions
Make parameters available in stackframes in JS too
Make fatal exception available from JS library

If a call to MiniGrace.compilerun exits with an exception, that error
will be made available in the "exception" property so that the user
interface can access it.
Give better debug strings for class/object in JS
Allow changing verbosity of JS
Retain correct line number for imports
Remove noSuchValue usage from JS DOM library