better support when you're connected to multiple slack teams
cache calls to channels.list
update the slack mark on irssi mark command or window change/activity
update the slack mark when we're at the bottom and new messages are received
only update the slack mark on new public messages for the active window
mark any windows that were requested
mark some variables as local
'window activity' isn't what we want; 'message public' seems to be enough
expire the channels cache when joining a new channel
Merge pull request #1 from jwm/jwm_update_slack_mark

update the slack mark on irssi mark command or window change/activity
Merge pull request #3 from jwm/jwm_support_multiple_slack_instances

better support when you're connected to multiple slack teams
Merge branch 'jwm-jwm_cache_channel_list'
Move known issues section to github issues

Created issue for async calls.
Remove signal_stop() from sig_away()
Merge pull request #7 from tedski/6

Remove signal_stop() from sig_away()
Fixed case for new users var