libsmack: revert access codes

Revert access codes as internal representation for access types
because they work much better when we have to merge rules.

Other aim of this patch is to clean up internal presentation.
After this change the whole access state can be represented
with only two integers.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
debian: add build dependency on doxygen.

Make sure that devel manuals will be generated for libsmack-dev package.
debian: convert for multi-arch packages.
debian: enable parallel build.

Support `dpkg-buildpackage -j' by adding --parallel to dh invocations.