complete multiarch support and misc packaging updates

multi-arch: xxx as appropriate, for libraries, and arch:all support
package, and to allow multiarch debug packages to co-install

flush dh-exec overkill

bump standards version

canonicalize vcs url
log changes
Merge branch 'upstream'
log changes
rm debian/source/include-binaries (png files)
remove build alts libtiff{5,4,3}-dev, see http://bugs.debian.org/735997
bump standards version
log changes
Merge branch 'upstream'
log changes
update upstream git repo
Merge remote-tracking branch 'upstream/master'
Fixed small bugs from Maks
Merge remote-tracking branch 'origin/debian'
fixed atomicDecrement in the absence of intel macros
Added the magic win32-dll option in LT_INIT (see bug 224)
Cast pointers to size_t instead of unsigned long