* Modernize CDBS usage: Drop local snippets (all included upstream now). * Use dpkg source format 3.0 (quilt). Stop including patchsys-quilt snippet. * Bump debhelper compat level to 7. * Bump standards-version to 3.9.3. * Use anonscm.debian.org URL in Vcs-Browser field. * Git-ignore quilt .pc dir. * Update package relations: + Build-depend unversioned on libgtk2.0-dev: Needed version satisfied even in oldstable. + Tighten build-dependency on cdbs: Needed for improved copyright- check. + Relax build-depend unversioned on debhelper and devscripts: Needed versions satisfied even in oldstable. + Stop build-depending on quilt or patchutils: Unneeded with source format 3.0 (quilt). + Build-depend (not only depend) on x11-apps: Needed to build example files. * Append (not early-(re)declare) build-dependencies. * Extend copyright years of Debian packaging. * Refresh patch 1001 with shortening quilt options -pab --no-index --no-timestamps. * Suppress copyright-checking binary files, to not upset dpkg-source. * Rewrite copyright file using format 1.0.