Command to install on Arch Linux based distros

Fixed a typo: scipts -> scripts.

Adding a usage example for Docker.

This release is dedicated to Stardew Valley, for fixing the Harvest Moon
unplayable issue where Ann gives up on her inventions after marriage ;_;

SC2164: show two possible variants for circumenting the warning

Add TravisCI Setup to README.md

always calling 'exit' is not good in e.g. functions.
the basic idea is at least that the returncode of
cd *is* evaluated somehow and not ignored.
Reported-by: NGarance Alistair Drosehn <drosehn@rpi.edu>
Signed-off-by: NBastian Bittorf <bittorf@bluebottle.com>

This commit fixes #797