topology21 developed to test new objects. LineGenerationJSON.py updated to read the JSON input for BatchSiurce and BatchDecomposition. Test updated to include topology21

documentation and examples modified to reflect the ascending priority in the priority scheduling rule

Priority and NextStage scheduling rule changed to work in ascending order (i.e. lowest priority value first). This should be reflected to documentation! In Topology20 input all the priority values p have been changed to -p so that it gives the same result and passes the test

imports script made so that a user can import ManPy objects in an easier way (see SingleServer.py in example). Dipo's idea, I have to see if it is ok. Old way also works