Refer: http://kodi.wiki/view/HOW-TO:Install_Kodi_for_Linux
$ sudo apt-get install software-properties-common
$ sudo add-apt-repository ppa:team-xbmc/ppa
$ sudo apt-get update
$ sudo apt-get install kodi
Note: To keep the XMBC player from always going full screen, go to:
System, System, Video output, and set Display Mode to Window