Py_USING_UNICODE is defined

* The default __reversed__ performed badly, so reintroduced a custom
  reverse iterator.
* Added length transparency to improve speed with map(), list(), etc.

This gives another 30% speedup for operations such as
map(func, d.iteritems()) or list(d.iteritems()) which can both take
advantage of length information when provided.

directory.

* Split into three separate types that share everything except the
  code for iternext.  Saves run time decision making and allows
  each iternext function to be specialized.

* Inlined PyDict_Next().  In addition to saving a function call, this
  allows a redundant test to be eliminated and further specialization
  of the code for the unique needs of each iterator type.

* Created a reusable result tuple for iteritems().  Saves the malloc
  time for tuples when the previous result was not kept by client code
  (this is the typical use case for iteritems).  If the client code
  does keep the reference, then a new tuple is created.

Results in a 20% to 30% speedup depending on the size and sparsity
of the dictionary.

* Factored constant structure references out of the inner loops for
  PyDict_Next(), dict_keys(), dict_values(), and dict_items().
  Gave measurable speedups to each (the improvement varies depending
  on the sparseness of the dictionary being measured).

* Added a freelist scheme styled after that for tuples.  Saves around
  80% of the calls to malloc and free.  About 10% of the time, the
  previous dictionary was completely empty; in those cases, the
  dictionary initialization with memset() can be skipped.

ifilterfalse().

  wrong type of database in dbshelve.
* fix a typo in the exception name when checking args

correct function)

2. Touch up help.txt

M config-highlight.def
M help.txt

Code coverage for binascii.c is at 92%.
From SF patch #736962.

exact turned on.  The tiny space savings wasn't worth the additional time
and code.

2. Convert 1/0 to True/False
3. Fix a couple of long lines

M ColorDelegator.py
M NEWS.txt

scheme in situations that likely won't benefit from it.  This further
improves memory utilization from Py2.3 which always over-allocates
except for PyList_New().

Situations expected to benefit from over-allocation:
    list.insert(), list.pop(), list.append(), and list.extend()

Situations deemed unlikely to benefit:
    list_inplace_repeat, list_ass_slice, list_ass_subscript

The most gray area was for listextend_internal() which only runs
when the argument is a list or a tuple.  This could be viewed as
a one-time fixed length addition or it could be viewed as wrapping
a series of appends.  I left its over-allocation turned on but
could be convinced otherwise.

array.extend() now accepts iterable arguments implements as a series
of appends.  Besides being a user convenience and matching the behavior
for lists, this the saves memory and cycles that would be used to
create a temporary array object.

lists.  Speeds append() operations and reduces memory requirements
(because of more conservative overallocation).

Paves the way for the feature request for array.extend() to support
arbitrary iterable arguments.

- there were no accessor functions for the global per-database fields
- packages and their dependencies were installed in order in stead
  of in reverse order.

Bob Ippolito.

public API from being exposed by simply including Python.h (as recommended).

to its dependencies. Fixes #733819.

(Contributed by Greg Chapman.)

(Contributed by George Yoshida.)

Added support for the copy module.