First step to port the script to Firefox

We have to copy/paste the script into the chrome/src folder because
chrome extension can't handle symlinks :(
Added the generated FF add-on and auto-update file
Created generate script and bumped the versions
Implemented Derek's change and updated the readability of the markdown
input
Merge branch 'master' into port_script_to_firefox
Merge pull request #3 from mathijsblokland/port_script_to_firefox

Port script to firefox