Groupby now has legitimate (non-binary) effect.
Groupby now has legitimate (non-binary) effect.

Conflicts:
	bandicoot/helper/group.py

yvesalexandre/bandicoot,ulfaslak/bandicoot,econandrew/bandicoot,ulfaslak/bandicoot,yvesalexandre/bandicoot,yvesalexandre/bandicoot,ulfaslak/bandicoot,econandrew/bandicoot,econandrew/bandicoot