[Pas2js] Integrate the DFM2PAS serialization in pas2js compiler.

[Tomislav Avramovic]

I think this future is best to be part of pas2js!
WebApp<>BinApp
Integrate lfm as resource as in Delphi/Lazarus is not necessary 
complication and add too much code, just to create and initialize some 
components/controls.
TMS chose right path dfm2pas (keep it simple).
If this future is missing in pas2js then we must create 
precompiler/preprocessor to convert working pas source to build pas 
source and then compile second build pas source with pas2js.

Looking in the generated js code there is a lot of dead code.
Is there any option or plan to optimize generated code to include only 
used code?