How to install latest TortoiseHg on Ubuntu

The version of TortoiseHg in Ubuntu can get quite outdated with time. Thankfully, installing and being updated with the latest version of TortoiseHg is pretty easy:

$ sudo add-apt-repository ppa:tortoisehg-ppa/releases
$ sudo apt-get update
$ sudo apt-get install tortoisehg

If apt complains that it needs a newer version of Mercurial for this installation, then install the latest Mercurial.

Tried with: TortoiseHg 2.10.2, Mercurial 2.8.2 and Ubuntu 12.04