Fix borked control flow

Sometimes the control flow gets borked in tmux. I don't know why but I'm
[not the only one][1]. Now we run `stty -ixon` when we force a tmux
reload.

I know that is in my .bashrc but this is after bash has initialized and
I've been using Vim and such for many hours.

[1]: http://stackoverflow.com/questions/18647277/tmux-is-blocking-ctrl-s-in-osx-ml

home/.tmux.conf

@@ -33,7 +33,7 @@ bind-key C-j command-prompt -p "Join pane from (vert):"  "join-pane -v -s '%%'"
 bind-key S command-prompt -p "Send pane to (hoz):"  "join-pane -t '%%'"
 bind-key C-s command-prompt -p "Send pane to (vert):"  "join-pane -v -t '%%'"
 #unbind-key % # Remove default binding since we’re replacing
-bind-key r source-file ~/.tmux.conf
+bind-key r run "tmux source-file ~/.tmux.conf; stty -ixon"
 bind-key C-q command-prompt -p "Switch to session:" "switch-client -t '%%'"
 
 # Copy mode