Update to 2.0.0b4

- Drop upstreamed or obsolete patches
- python-cycler >= 0.10.0 is required
- move around Requires and BRs and sort more or less alphabetically
- don't ship baseline images for tests (like Debian)
- Require stix fonts only when they're not bundled
- disable HTML doc building for bootstrapping 2.0.x series
- relax image rendering tests tolerance due to freetype version differences
- disable some failing tests on aarch64 for now

20_matplotlibrc_path_search_fix.patch

@@ -22,15 +22,3 @@
      fname = os.path.join(path, 'matplotlibrc')
      if not os.path.exists(fname):
          warnings.warn('Could not find matplotlibrc; using defaults')
---- a/lib/matplotlib/cbook.py	2016-05-20 14:14:52.000000000 +0200
-+++ b/lib/matplotlib/cbook.py	2016-05-20 19:28:57.373601582 +0200
-@@ -823,8 +823,7 @@ def get_sample_data(fname, asfileobj=Tru
-     if matplotlib.rcParams['examples.directory']:
-         root = matplotlib.rcParams['examples.directory']
-     else:
--        root = os.path.join(os.path.dirname(__file__),
--                            "mpl-data", "sample_data")
-+        root = os.path.join(matplotlib._get_data_path(), 'sample_data')
-     path = os.path.join(root, fname)
- 
-     if asfileobj: