Heaps backend its missing some methods + Scripting its Lime "Exclusive" due to unchecked code

[theoo-h]

In the Heaps backend methods such as list and getPath are not implemented.

This becomes a problem if you want to use Scripted Classes, because the method ScriptedClass.listScriptClasses() requires list to work.
Also, PolymodScriptClass uses lime.app.Promise for load assets asynchronously, without any platform check, making scripting only compatible with Lime platforms.