Clean up option --moduleName.

Change moduleName option to [true|false|default] and delegate
default to each module transformer.
Set the default for moduleName to 'default'.
Pass options to ModuleTransformers via arguments rather than module exports.
Create transformOptions view dynamically from local options object.	
Set moduleName false for single file compile, true for bundles.

Fixes #1588
Can we treat `default` as true in the transformer instead of mutating the option? That way we do not have to create a clone and mutate it.