OSC Chemistry Template WIP

The initial build of the OSC Chemistry Template as a work-in-progress pull request for review and comment.  We are about 75% complete for our first 80% template. :)  Test data has been created to reflect the look and feel of the annotated template.  
yes,  but not a way to override them.  Well,  actually they aren't mixin's in page-skeleton/slots.  Just a basic boilerplate which was fine, but then they began to change them.  So, we have this type of structure in psychology as well.  So, at some point we will have to make the page code actually a mixin that can be modified on a per book basis