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-fes.patch

@@ -1,20 +1,18 @@
 diff -up src/module_list.py.orig src/module_list.py
---- src/module_list.py.orig	2017-11-08 08:27:07.539215946 -0500
-+++ src/module_list.py	2017-11-08 08:27:17.051216310 -0500
-@@ -523,11 +523,11 @@ ext_modules = [
+--- src/module_list.py.orig	2018-05-18 09:34:28.942183178 -0600
++++ src/module_list.py	2018-05-18 09:35:15.210542150 -0600
+@@ -464,10 +464,10 @@ ext_modules = [
      Extension('sage.libs.ecl',
                sources = ["sage/libs/ecl.pyx"]),
  
 -    Extension("sage.libs.fes",
 -             ["sage/libs/fes.pyx"],
 -             language = "c",
--             libraries = ['fes'],
--             package = 'fes'),
+-             libraries = ['fes']),
 +#    Extension("sage.libs.fes",
 +#             ["sage/libs/fes.pyx"],
 +#             language = "c",
-+#             libraries = ['fes'],
-+#             package = 'fes'),
++#             libraries = ['fes']),
  
      Extension('sage.libs.flint.flint',
                sources = ["sage/libs/flint/flint.pyx"],