[Patch #1375417] Massive rearrangement of the Library Reference. Fred approved just checking it in; he may make further fixes.
[Patch #1375417] Massive rearrangement of the Library Reference.
Fred approved just checking it in; he may make further fixes.

The change shrinks the 'Generic OS' and other OS chapters, which had become
something of a dumping ground for random modules.  It differs from the
last version of the patch: 1) I've added introductions for the new chapters (still missing a few -- search for 'intro')
2) a few modules have been rearranged slightly from the version in the patch

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator