Merge branch 't/16100/keep_going_in_doc_errors' into t/16058/public/16058
Experiment with moving the indexes around and toward the source tree
Merge 6.2.beta8 into t/16058/public/16058
Trac 16058: change the label in the sphinx-autodoc files for <module>.__init__.py to <module>
Trac 16058: Reorganize the documentation indexes into src/sage/combinat

- For example, the thematic index
  src/doc/en/reference/combinat/crystals.rst is now in:
  src/sage/combinat/crystals/__init__.py and is accessible through
  sage.combinat.crystals?

  (to be discussed: should this be put in all.py instead?)

- What's left in doc/en/reference/combinat is basically autogenerated.
  (the building of module_list.rst there still needs to be regenerated by hand)

- All p/cython files in sage/combinat/ are now included in the reference manual

- Improved thematic indexes

- New thematic indexes: algebraic_combinatorics, catalog_partitions,
  counting, enumerated_sets

- Fixed some documentation syntax glitches here and there

- Added the catalogs of permutation groups and matrix groups to the
  reference manual so that we can link to them.

- Draft of sage.combinat.quickref

TODO:

- proof reading
- choosing the right entry points
- checking that the links are functional

- deciding on how to link to classes/functions (in the index we would
  want to have the title of the documentation of the class rather than
  the name of the class. Or maybe both).
Trac 16058: Reorganize the documentation indexes into src/sage/combinat (follow up little fixes)
Merge branch 'develop' into t/16058/public/16058

Trival conflicts:
	src/doc/en/reference/combinat/index.rst
Fixed cross references, add title to all.py files
Trac 16256: Merge branch 'public/16058' into  u/nthiery/16058-combinat-doc-index

Conflicts:
	src/doc/en/reference/combinat/index.rst
	src/doc/en/reference/combinat/root_systems.rst

Note: the index in root_system_types.rst has been moved to the
introductory doc of sage.combinat.cartan_type.py.
Trac 16256: fixed some cross references and doc compilation issues
make DefaultConvertMap a morphism in SetsWithPartialMaps()
add Map._category_for and Map._set_parent()
Trac 15618: fix category of the Q_to_Z morphism
Trac 15618: do not change category in FiniteDimensionalAlgebra._Hom_()
Trac 15618: delay setting _category_for to avoid unpickling trouble
Trac 15618: add doctests
Implement sequences of bounded integers
Merge branch 'develop' into ticket/15820

* develop: (378 commits)
  Updated Sage version to 6.3.beta1
  trac #16237: Typos
  Use lazy_import instead
  Use point collections more directly.
  trac #15036: fix late import of is_Matrix to avoid startup problems
  Fixes to normal_form_pc to work with point collections properly.
  Fixed failing doctests.
  trac #16277: A typo
  minor fixes
  Trac 15099: numeric evaluation of zetaderiv
  trac 16211: Review reviewer patch.
  Added a category parameter to Module
  change raise syntax to python3 style
  trac #16326 clean-up of code in dyck_word.py
  Trac #6637: More deprecation doc in backtrack.py
  Some other potential cython speedups.
  Fixed pickling issue.
  Some tweaks in the cythonization.
  More cythonization.
  Trac #6637: fix doctest in root_system/plot.py
  ...
Relocate bounded integer sequences (sage.misc, not sage.structure)
Pickling of bounded integer sequence. Documentation of cdef functions