Engine:
* Keep sudden death from starting while using a multi shot weapon (will start after the last shot now) - This fixes
issue #1
* Keep the engine from crashing when trying to place a girder at the bottom map border (right above the water line) - This fixes issue #16
Add some more strictness, use unsafeThaw and unsafeFreeze functions which work at O(1)
disable AI teleport
show on screen controls only if hedgehog is not a hog
fix reloading of teams
reworked the initialization functions, now it should be safe to update and no more need of spinning wheel at first launch
adjusted default zoom value
polished lobby interface
updated ammosets to new weapons