Updating Readme and minor template.

I did not really change anything on the template yet, because I can not get it to work this would probably help me https://github.com/jreinhardt/handkerchief/issues/2.

As for the readme:

1. I had to check how to install this and people might not know anything about python, so the small install section would be helpful.

2. Adding this function to the bash makes it so much easier to use when installed globally. 
Better yet would be if the script did that automatically but until then this might help.