* Migrate set() and frozenset() from the sandbox.
* Install the unittests, docs, newsitem, include file, and makefile update.
* Exercise the new functions whereever sets.py was being used.

Includes the docs for libfuncs.tex.  Separate docs for the types are
forthcoming.
diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
index e84cfbd..d47a9da 100644
--- a/Lib/test/test_builtin.py
+++ b/Lib/test/test_builtin.py
@@ -2,7 +2,6 @@
 
 import test.test_support, unittest
 from test.test_support import fcmp, have_unicode, TESTFN, unlink
-from sets import Set
 
 import sys, warnings, cStringIO
 warnings.filterwarnings("ignore", "hex../oct.. of negative int",
@@ -1104,9 +1103,9 @@
     get_vars_f2 = staticmethod(get_vars_f2)
 
     def test_vars(self):
-        self.assertEqual(Set(vars()), Set(dir()))
+        self.assertEqual(set(vars()), set(dir()))
         import sys
-        self.assertEqual(Set(vars(sys)), Set(dir(sys)))
+        self.assertEqual(set(vars(sys)), set(dir(sys)))
         self.assertEqual(self.get_vars_f0(), {})
         self.assertEqual(self.get_vars_f2(), {'a': 1, 'b': 2})
         self.assertRaises(TypeError, vars, 42, 42)