LM update from 10 to 11

Method

1. Open a terminal and run 'sudo bash' to get a root terminal
2. Using a text editor (as root), replace the contents of /etc/apt/sources.list with the following sources list:http://pastebin.com/wVGb13y3 (extracted from Linux Mint 9)
3. Run 'apt-get update'
4. Run 'apt-get dist-upgrade'
5. Follow the instructions issued, don't worry about overwriting configuration files dpkg will keep a copy in the same directory with the string ".dpkg-old" appended to the filename
6. Run 'apt-get upgrade'
7. Reboot