metaform: added pulldown support, added leftcheck

metaform: added pulldown support, added leftcheck
metaform now ships a seperate stylesheet.
metaform captions are cleaned up (underscores to spaces and capitalization)
metaform's generated php has less duplication
added enc_upper()
enc_whatever functions can recieve the field name as the second parameter
format_options() forces the value to be something in the options list
metaform's auto-generated submit button says "Send" if it's e-mail only