Changed cluster_launcher to work with public lein.
thelmuth/cluster-lein-fix
Merge branch 'master' into ultra-and-env

Conflicts:
	cluster_launcher.py
Before lexicase starts, it retains only one indvidual per different error
vector. This does not change the behavior of lexicase at all, but may speed
it up.
Merge branch 'lexicase-speedup2' into ultra-and-env
Added 4-bit digital multiplier problem files.