Quick fix for hiding the screen when AssetAPI cant handle any asset requests made to it (eg. no registered factoris for any of the needed assets).
Hide loading screen if no transfers are ever instantiated from the scene. Move asset transfer monitoring to LoadScreenPlugin. Add AssetAPI event for transfer num change (facilitates the previous code). Remove scriptPostFix legacy hack (webrocket).
Remove optional plugins from the SDK build. If a user wants these in the SDK he can make his own build and add them. TODO: Figure out a way to build/ship optional plugins with the SDK without embedding them to the main sdk js file.