Enable monochrome output in the 'up' and 'logs' commands

Some systems, like Jenkins or other build servers, cannot correctly
render ANSI color codes.  The '--no-color' option enables monochrome
output in the 'up' and 'logs' commands to improve readability in those
systems.

Signed-off-by: Tim Freund <tim@freunds.net>
Merge pull request #384 from timfreund/master

Enable monochrome output in the 'up' and 'logs' commands