Merge pull request #1 from marbelous-lang/master

Getting up to date with main branch
Optimization

Reduced size of Sort from 30 to 20 cells, knocked a quarter tick off Less, reduced size of Grtr by 1/3 and knocked off half a tick, added 2 cells to Lteq and Gteq to reduce the ticks by 3/4 of a tick.
Alternative (smaller) Andd

Slightly smaller and less marbles to track, not entirely equivalent.
Fixed Nt
Merge branch 'master' of https://github.com/overactor/marbelous.py into overactor-master

Conflicts:
	examples/logical_operations.mbl
Merge branch 'overactor-master'