gdlmm-3.7.3-bp150.2.3

- Fix SRPM group. Update summaries.

- Modernize spec-file by calling spec-cleaner

- Stop exporting CFLAGS and CXXFLAGS, no longer needed due to
  changes in libsigc++.

- Export CFLAGS="%{optflags} -std=c++11" and CXXFLAGS="%{optflags}
  - std=c++11". Fix build with updated MM stack.

- Update to version 3.7.3:
  + Support of GDL 3.7.3
  + Method Dock::hide_preview added.
  + Method DockObject::is_automatic removed.
  + Method DockObject::set_manual removed.
  + Method Dock::xor_rect_hide removed.
  + Method Dock::get_layouts_ui removed.
  + Add missing parameter to Dock::dock_drag_motion.
- Drop gdlmm-gdl-3_4.patch and gdlmm-gdl-3_6.patch: fixed upstream.
- Rename libgdlmm-3_0-1 to libgdlmm-3_0-2, following upstreams
  soname bump.

- Add gdlmm-gdl-3_6.patch: Fix build with gdl 3.6.0.

- Fix build with gdl 3.5.5:
  As gdlmm-gdl-3_4.patch touches the main definitions,
  bootstrapping is actually required:
  + Add doxygen, graphviz and xsltproc BuildRequires
  + Pass --enable-maintainer-mode and --enable-documentation to
    configure.

- Add gdlmm-gdl-3_4.patch: Fix build with gdl 3.4.0.
- Drop xz BuildRequires as it now comes for free in the build
  system.

- patch license to follow spdx.org standard

- Update to version 3.3.2:
  + Suppressed left-over gdl_dock_layout_run_manager
  + Revert "use maintainer mode by default"
  + Fix compilation of the example
- Drop gdlmm-remove-dropped-api.patch: fixed upstream.
- Rename libgdlmm-3_0-0 to libgdlmm-3_0-1, following the upstream
  soname change.
- Add xz BuildRequires because we can't build a package for a
  xz-compressed tarball without explicitly specifying that... See
  bnc#697467 for more details.

- Add gdlmm-remove-dropped-api.patch: remove API dropped in gdl
  3.3.x.

- Update to version 3.2.1:
  + Don't use maintainer mode by default.

- New package (version 3.2.0).