change algorithm description.
update comments: kevin's list of ports, not world port index.
move write.csv to outside of function.
remove "csvs" dir from write.csv.
still working on 50/50 stuff.
move decport above perport.
Just tried to reconcile.  Hope I did it right.

Merge branch 'master' of https://github.com/kaycole/fish_shift

Conflicts:
	Code/frame.R