These fixes are not agressive as some of the code is complicated
and it is better to be careful.

The files numeric.py and numerictypes.py are not easily analysed
and the latter is self modifying. Pyflakes generates a number of
invalid warnings for those files.

Most of these fixes involve putting blank lines around

.. versionadded:: x.x.x

and

.. deprecated:: x.x.x

Some of the examples were also fixed.

When taking a slice of a chararray it was calling the rstrip() method
on the resulting slice, resulting in a new array rather than a view
of the original.  This was an unintended consequence of the sq_slice
member of the tp_as_sequence mapping being ignored in Python 3, so
that slice lookups go directly through __getitem__.

Fix test_expandtabs to not make the assumption that rstrip() will be applied twice to a value when using T[x][y] style indexing.

 - {ndarray, bool} -> ndarray or bool
 - {int, array of ints} -> int or array of ints
 - {str, function} -> str or function
 - {sequnce, int} -> sequence or int
 - {array_like, poly1d} -> array_like or poly1d
 - {None, list of `m` scalars, scalar} -> list of `m` scalars or scalar

Following deprecations would cause problems otherwise.

Now that only Python versions 2.6-2.7 and 3.2-3.3 are supported
some version checks are no longer needed. This patch removes them
so as to clean up the code.

The numliterals fixer replaces the old style octal number like '01' by
'0o1' removes the 'L' suffix.

Octal values were previously mistakenly specified in some dates, those
uses have been corrected by removing the leading zeros.

Simply Removing the 'L' suffix should not be a problem, but in some
testing code it looks neccesary, so in those places the Python long
constructor is used instead.

The 'long' type is no longer defined in Python 3. Because we need to
have it defined for Python 2 it is added to numpy/compat/np3k.py where
it is defined as 'int' for Python 3 and 'long' for Python 2. The `long`
fixer then needs to be skipped so that it doesn't undo the good work.

Closes #3074, #3067.

Add `print_function` to all `from __future__ import ...` statements
and use the python3 print function syntax everywhere.

Closes #3078.