[osis-core] remove divType attrib from <div>

[Troy A. Griffitts]

> Would taking the divType attribute off of <div> and allowing the generic 
> type attribute break any of your texts?
> 
> Troy: Same question?

Nope, I didn't even know it existed :)  I use type=  (currently 
incorrect, I guess), so your change will make my docs MORE correct :)

Chris might have a different answer, but being the perl guru he is, I'm 
sure he could easily modify this, or I could use the most powerful 
editor in the world to simply do:	 :)

:g/divType=/s//type=/g