New plugin manager half-implemented. Most of the UI/frontend code is done. Moved sql_parse.php to /includes/ to allow use after installation - TODO: check installer, etc. for breakage

.panel_wrapper {height:85px;}
.panel_wrapper div.current {height:85px;}

/* IE */
* html .panel_wrapper {height:100px;}
* html .panel_wrapper div.current {height:100px;}