Bug fix: Escape {} in pattern for nickname insert
Priority fix (overriding other patterns)
Switch pastebins for botchat (p.defau.lt is apparently down)
Move persistent state save to markovmix DB instead of stand-alone files

Hopefully this will avoid the problems with writing
files, including issues with them being truncated
to 0 bytes and other nasty stuff.

Remove state file command-line options since they
are no longer used.
Don't remove own nick from output message if there's no known speaker nick to replace with
Fix load_state/save_state bypassing with no id defined (fix wrong var ref)
Update response for questions about bot's own code bugs/issues