fix cross detection with walls for mob putting in test mode, add tests
extract sid generation to utils.GenerateSID() func
extract setting activer's characteristics while create in test mode
add putPlayer action and tests for it
fix login action : now server code can be compiled
clean up player list in stop testing (tester remains only)
add logout after simple_walk test session
remove makeMove action
extract perfoming player's action to separate function
add enforce action
fix putPlayer action: now it returns sid and id
replace old motion test to new; add tests for sliding and bound collision