Made kountdown also spew markov-chained lines at random, with the probability inversely proportional to channel posting rate.
Made kspsearch use DDG instead of google (due to new API)
cactools: changed relay format; improved ltell
kdhelp: additional line is now NOTICE'd personally
kountdown.py: code improvements, output beautification & a new command:
	outsourced checks on restricted commands to @restrictedcommand decorator;
	changed ctmutex to be an actual semaphore;
	made event notices in channels shorter(and NOTICE instead of MSG);
	added kdesc command;
	improved timeleft format;
	extended timeline.