Enable public subs, track privacy_type in Subscriptions
Factor out sub startup for public/private split
Small fixes

rename cleanup_subs cleanup_auths
allow 'authorize' command in PM only
save empty string for token for public subs
clearer token ask
Show only 10 latest events at addsub time
Update README, .plan
Merge branch 'public_subscriptions'

Conflicts:
	plugin.py