Split the contents of microkernel.rst into several files. Each file
contains only the information of a specific object type. Labels have
been added to accomodate cross-references to each object type. Changed
the tables that did not comply with a 100 character line length.
Change-Id: I983bc76a89b1cf01442de53737de4f76a5262264
Signed-off-by: Rodrigo Caballero <rodrigo.caballero.abraham@intel.com>