added check_cmdline_params to two_alt_choice.py
added check_cmdline_params to two_alt_choice.py

opyrant/opyrant,MarvinT/pyoperant,gentnerlab/pyoperant,opyrant/opyrant,MarvinT/pyoperant,MarvinT/pyoperant,gentnerlab/pyoperant,gentnerlab/pyoperant,gentnerlab/pyoperant,theilmbh/pyoperant,theilmbh/pyoperant,theilmbh/pyoperant,theilmbh/pyoperant