configure.ac: Bump version number
Some vala code build fixes
pkcs11: Initial port of pkcs11 code to vala

Some bits are not yet ported, but this is the basic effort.

Bump the Gcr dependency to 3.11.91, which is as yet unreleased
work on that library.
Makefile.am: Use a non-recursive Makefile

As you can imagine this involved quite a bit of cleanup.

The help/ po/ pixmaps/ data/ directories are still recursive.
Makefile.am: Disable building of vala during distcheck

This way we can check that we distributed all the correct
built sources in the tarball.
Makefile.am: Fix vala make timestamp interaction

valac appears not to update the timestamps of files that don't
change even make decided that they needed to be rewritten. So
include a 'touch' to force the timestamp update.
Makefile.am: Remove use of libtool since we don't make libraries

seahorse doesn't make libraries. No need to mess around with
ugly nastiness like libtool.