only show message when connected to tty, closes #317
only show message when connected to tty, closes #317

Conflicts:
	lib/unipept/bin/unipept

bmesuere/uni-test,unipept/unipept,bmesuere/uni-test,unipept/unipept,unipept/unipept,bmesuere/uni-test,bmesuere/uni-test,unipept/unipept,bmesuere/uni-test,unipept/unipept