relative links clickable and query String appendable

Added a new option to append query string to links

Hello Gildas, I added an checkbox in the options so the queryString from the URL is appended to the links.

I also made the relative links clickable because we always needed to copy and paste the path after the hostname which was very annoying to us.

I'm not sure this could be helpful for everyone but anyways, I thought that you could be interested in this change. Also im not sure if I done it the proper way, its the first time I play with chrome extensions

thank you