Add find_app_or_install bash function

Check if the program exists in the system. If not apt-get install the
program.
Fix style formatting
Rename script name for consistenncy.

This is just to make sure all my own script start with a verb either
like build or setup.
Add script to setup local development domain using dnsmasq.

This script will make all domains end with certain pattern, example like
.dev to resolve to localhost/127.0.0.1.