Added code to test 1) if every script is importable 2) If they run without crashing. Quality of the output is not checked in current test script. This is mainly to ensure that scripts run without crashing. Later more tests are to be added to evaluate quality of the output.

Also code for adding relative paths for all the sounds and other modules are changed to make sure these scripts can be called from any location. There were few problems with the way relative paths were added in earlier version of these codes.