emacs byobu ssh true color setup

running ediff over byobu ssh sessions has poor colors. I can't see color markings, therefore it's difficult to do diff and merge.

For emacs itself

https://gist.github.com/choppsv1/e8198df70cb1778b04d6 (Managed to improved color without this patch)

remove ubuntu tmux
tmux upgrade from github https://github.com/tmux/tmux. Also need to compile and install http://libevent.org/ for tmux

For bybou
Must: tmux backend

Enable true color for gnome-terminal
add ppa 
http://askubuntu.com/questions/512525/how-to-enable-24bit-true-color-support-in-gnome-terminal
sudo add-apt-repository ppa:gnome3-team/gnome3-staging
sudo apt-get update
sudo apt-get install gnome-terminal

some additional fonts for better non-english display:
sudo apt-get install ttf-liberation ttf-dejavu xfonts-terminus xfonts-terminus-oblique