LP Bug Opener per Y.C Cheng

For a heavy launchpad user (https://launchpad.net/), we got lots of bug number from time to time. To open the bug, we need to go url like

https://bugs.launchpad.net/bugs/1

if we want to open bug #1. That's a long url to type. Also if we want t open several bug at the same time, it cost more time.

With this add-on, a user can just paste the bug number, or a paragraph with bug number, the script will try to find the bug number, and ask browser to open the link.

If there is one bug number detected, it will open a new tab and open the link there.

If there is more than one bug number detected, it will create a new window, and open those bug url there.