Fix vim/tmux pane switching
Merge pull request #114 from joaosa/master

Fix vim/tmux pane switching
Bind <prefix> C-l to C-l to restore some way of clearing the shell.

I'm using this with an iTerm2 keybinding, cmd+k, to send the hex codes 0x01 0x0C. I chose cmd+k because that's the keybinding Terminal uses to clear the screen normally.
Merge branch 'master' into mine
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