added webchat.tpl and webchat.php for viewing chat/irc embedded in
oc-layout, defined MNU_CHAT in data.sql, disabled template caching, moved webchat
URL to settings file, removed inclusion of not needed
lib2/logic/logpics.inc.php, increased size of chat window and made it
configurable via settings file, updates #196
added webchat settings and translations; some detail changes; update #196