debian/rules: Update get-orig-source target.
debian/rules: Remove override_dh_auto_clean target; no longer needed.
debian/rules: Update override_dh_auto_install target; Makefile now respects DESTDIR.
debian/changelog: Draft for version 2.3-1.
debian/control: Bump Standards-Version to 3.9.6; no changes required.
debian/control: Remove unnecessary Build-Depends on x11proto-core-dev.
debian/control: Update Architecture to linux-any.
debian/changelog: Update; switch distribution to unstable.