cm_tmux runs amok, blocks other plugins

[phmarek]

The cm_tmux triggering needs some kind of rate-limiting.

I'm not sure about the exact workflow, but when other plugins are doing heavy communication (eg. vlime) [1] there is some kind of interaction that makes the cm_tmux part of n-c-m run within a very tight loop (every few msec, consuming a CPU).

Ad 1: It's not even that real screen updates are needed - just communication to another vim plugin already triggers that problem.

Thanks for listening!