Update parent_selection.clj

Added trivial-geography to lexicase selection
Update parent_selection.clj

Added trivial geography to lexicase selection.  Rather than creating separate parameters for geolexicase, this uses the trivial-geography-radius parameter.
Added printing of total time and fixed "milliseconds" typo.
Geolexicase selection; calc mods.
Merge branch 'master' into timing-addition
thelmuth/experiments-plus-age
Merge branch 'master' into age-enhanced-lexicase

Conflicts:
	src/clojush/pushgp/parent_selection.clj
Merge branch 'age-enhanced-lexicase' into experiments-plus-age
Merge remote-tracking branch 'thelmuth/experiments-plus-age' into experiments-plus-age
Fixed my error in geolexicase
Geolexicase bug fix; commented out jvm-opts in project.clj.
Merge branch 'master' into age-enhanced-lexicase
Merge branch 'master' into experiments-plus-age
Added Change problem.
Added file for testing a hand-written solution program.
Changed cluster_launcher for change problem
Tweaked change.clj for more generations and population.
Merge remote-tracking branch 'thelmuth/change-problem' into change-problem
Updated cluster_launcher.py for better functionality.
cluster_launcher changed for more change experiments