add links to project in readme and usage message

[jasonblewis]

Add links to the project git repo in the readme and usage message

[ramnes]

Hey, sorry for the huge response time!

Why is this needed?

[jasonblewis]

Hi,

Just so when I look again at this script on my system in 10 years time, I can see where I got it from originally :)

[ramnes]

Let's just add the header then, no need to remind the users everytime they look at the --help. :)