JOIN and PART

JOIN and PART messages are read at max speed while on Twitch and the IRC
library can now properly return JOIN and PART messages into the message
array.  Also a quick fix to the TTL, message que TTL bumped up to 31.
Lastly, !memusage added.  Prints out the memory allocation that the
script holds in RAM.  Does not take into account the heap size or the
PHP environment though.