Added a minimal CGI-style capability.
Routes anchored at "cgi-bin" will attempt to invoke external programs
in 'static/cgi' with working directory 'static'.  This allows programs
like the Aspire advisor to be integrated into gitit and take
advantage of its authentication mechanism.
Removed ckeditor.js and create.js from scripts list.
Changed class name of semgitit infobox to have 'sg-' prefix.
Added a bunch of ui-related scripts.
Removed comments from content area.
Expanded dropdown options.
Added setenv, for CGI mechanism.
Option template for edit form template.