#4 css field for objtypes

[Jesse Norell]

I'd like to add a field to objtypes that is the url to a css file; if the field is specified it'll include that css source in the output.

The bulk of the html I'm writing is just repetitive visual changes, many trying to use @@IFCONN@@; it would make things much smaller and cleaner to just have css support and I'll use IFCONN to set the class assignment.