complete rewrite of the update ext (again)
much cleaner than previous version
affixed the [beta] tag since this still has a few issues (mainly error checking/displaying etc.)
have pool description use BBcode
onSearchTermParse regex should be case insensitive
order images sorted by score
this is solution for issue #17 (Method to sort by top scored images in numeric_score module)
cleaned up popular_by pages
my old code was so messy :<
adds widget/thumb option to random_thumb ext (for #323)
this code was suggested in the comments, but never actually added
use mt_rand() instead of rand()
rand() isn't so random on windows: http://tjl.co/blog/code/followup-php-rand-vs-mt_rand/
mt_rand() is also slightly faster
Merge pull request #379 from DakuTree/patch-2

Misc tweaks/fixes (fixes/closes issue 17 & 323)