Sync' with latest Debian uploads plus few updates toward the next upload.

Conflicts:
	debian/changelog
Fixed tarball name to match version from configure.ac.
More Debian packaging changes, these are more interesting, some highlights:
- multiarch support;
- binary hardening (e.g. stack protector, fortify source);
- updated to use latest dpkg-source format (3.0) and quilt, and got rid of CDBS.

Conflicts:
	debian/libsox2.dirs
	debian/libsox2.install
	debian/rules