Install cinnamon 1.8 on Debian 7 wheezy

Cinnamon is a new desktop environment for linux that was initially developed for Mint linux and later made available to all linux distros in general. It is derived from the Gnome 3 desktop, but provides the traditional kind of desktop environment. Cinnamon uses Muffin, a fork of the GNOME 3 window manager Mutter, as its window manager from Cinnamon 1.2 onwards