FLUID-5335: Updated to HTML5 doctype

Updated files to the HTML5 doctype and corrected validation errors.

Note: that there are a few cases that are meant to test RSF:IDS that have retained the old doctype and rsf:id's.

This pull request is dependent on https://github.com/fluid-project/infusion/pull/515

http://issues.fluidproject.org/browse/FLUID-5335