Custom Build Directory #204

Hey, I need to build my model in a specific folder for my program.

I have no clue if this functionality already exists but I've modified OMPython for my purpose.

Can someone tell me if there's a proper way and if there isn't, can we add this functionality to OMPython?
Many thanks!

Modification:
-Added "customBuildDirectory=None" as an argument for ModelicaSystem

-Added the following ModelicaSystem init:

if customBuildDirectory is not None:
    exp="".join(["cd(","\"",customBuildDirectory,"\"",")"])
    self.getconn.sendExpression(exp)