Moves the content found in the development part to the new Application
Development Primer. Creates a master file for the new part and a
placeholder for nanokernel-only applications. Labels that have already
been changed in prior changes of the topic were updated. The project's
master file was changed to include the new part.
Change-Id: I8e9df5b3e5d382997caf62b7503274e4821137e0
Signed-off-by: Rodrigo Caballero <rodrigo.caballero.abraham@intel.com>