Add some key bindings for tmux
remove ~/.tmux-buffer before running "save-buffer ~/.tmux-buffer"
Fix x-setup (remove unnecessary last backslash)
Add a key binding of tmux for reloading configurations
Modify tmux status bar configurations

Show load average
Change bg and fg of status-left and status-right
Add explicit fg color specifications of tmux status bar
Fix the shell commands to show load average

ref. https://coderwall.com/p/pt9cua
Add key bindings to change window for tmux