Include more doxygen info, flag undocumented material, update
.known_issues matching for known doxygen/sphinx issues
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
Add the "Introduction of Project Acorn" doc.
Also adds improvements to the doc generation processes, content styles,
removed doxygen-generated API material.
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>