Fix battle mode, where actors started only on paths

which is good, because they are not stuck, but there is sometimes
not enough space.
Shorten the travis test run
Remove obsolete TODOs
Save at each game start
Show clips per second in --stopAfter mode

and don't save, except at the exit.
Run less, but longer tests
Don't show clips per second with "--stopAfter 0" tests
Make the tests more uniform for maintenance and benchmarking