Less laggy Singuloose

In my minimal offline testing, this may perform better than the original
sing
less deadly test fix for singuloose
random (slower) tile eating

bumped gain to 3 50% chance to turn tile into space, may help out when
huge sing is eating mass amounts of the station
sing fix:: pesky welding fuel tank edition
Merge pull request #753 from cloroxygen/Bleeding-Edge

Less laggy Singuloose