Update to sagemath 8.2.

Also:
- Create the sagemath-data-combinatorial_designs subpackage.
- Create the sagemath-notebook-export subpackage.
- Unbundle the LaTeX makecmds style.
- Install LaTeX style files in a more canonical place.

sagemath-rpmbuild.patch

@@ -1,6 +1,6 @@
 diff -up src/module_list.py.orig src/module_list.py
---- src/module_list.py.orig	2017-11-08 06:16:18.175915367 -0500
-+++ src/module_list.py	2017-11-08 06:16:29.412915797 -0500
+--- src/module_list.py.orig	2018-05-16 12:35:55.223524926 -0600
++++ src/module_list.py	2018-05-16 13:13:20.467262594 -0600
 @@ -3,7 +3,7 @@ from glob import glob
  from distutils.extension import Extension
  from sage.env import SAGE_LOCAL
@@ -11,33 +11,33 @@ diff -up src/module_list.py.orig src/module_list.py
  #########################################################
  ### pkg-config setup
 diff -up src/sage/misc/cython.py.orig src/sage/misc/cython.py
---- src/sage/misc/cython.py.orig	2017-11-08 06:16:39.095916168 -0500
-+++ src/sage/misc/cython.py	2017-11-08 06:17:35.580918331 -0500
-@@ -497,7 +497,7 @@ extra_compile_args = %s
- 
- ext_modules = [Extension('%s', sources=['%s.%s', %s],
-                      libraries=%s,
--                     library_dirs=[SAGE_LOCAL + '/lib/'] + %s,
-+                     library_dirs=[os.path.realpath(SAGE_LOCAL + '/lib/')] + %s,
-                      extra_compile_args = extra_compile_args,
-                      language = '%s' )]
+--- src/sage/misc/cython.py.orig	2018-05-16 13:13:20.468262581 -0600
++++ src/sage/misc/cython.py	2018-05-16 13:16:29.207708998 -0600
+@@ -601,7 +601,7 @@ def cython(filename, verbose=0, compile_
+     ext = Extension(name,
+                     sources=[pyxfile] + extra_sources,
+                     libraries=libs,
+-                    library_dirs=[os.path.join(SAGE_LOCAL, "lib")] + libdirs,
++                    library_dirs=[os.path.realpath(os.path.join(SAGE_LOCAL, "lib"))] + libdirs,
+                     extra_compile_args=extra_args,
+                     language=language)
  
 diff -up src/setup.py.orig src/setup.py
---- src/setup.py.orig	2017-11-08 06:17:50.231918892 -0500
-+++ src/setup.py	2017-11-08 06:18:48.924921139 -0500
-@@ -422,9 +422,8 @@ class sage_build_cython(Command):
+--- src/setup.py.orig	2018-05-05 16:21:27.000000000 -0600
++++ src/setup.py	2018-05-16 13:17:40.774740719 -0600
+@@ -370,9 +370,8 @@ class sage_build_cython(Command):
              # Debugging
              gdb_debug=self.debug,
-             output_dir=self.build_dir,
+             output_dir=os.path.join(self.build_lib, "sage"),
 -            # Disable Cython caching, which is currently too broken to
 -            # use reliably: http://trac.sagemath.org/ticket/17851
 -            cache=False,
-+            # Enable Cython caching (the cache is stored in ~/.cycache which is
++            # Enable Cython caching (the cache is stored in ~/.cycache)
 +            cache=True,
              )
  
-         log.info("Finished Cythonizing, time: %.2f seconds." % (time.time() - t))
-@@ -850,9 +849,6 @@ class sage_install(install):
+         # Filter out extensions with skip_build=True
+@@ -881,9 +880,6 @@ class sage_install(install):
          install.run(self)
          self.install_kernel_spec()
          log.info('Cleaning up stale installed files....')
@@ -47,7 +47,7 @@ diff -up src/setup.py.orig src/setup.py
  
      def install_kernel_spec(self):
          """
-@@ -866,40 +862,6 @@ class sage_install(install):
+@@ -897,40 +893,6 @@ class sage_install(install):
          from sage.repl.ipython_kernel.install import SageKernelSpec
          SageKernelSpec.update()