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Changes for 0.91.0
==================
* Changed ``cbook.is_file_like`` to ``cbook.is_writable_file_like`` and
corrected behavior.
* Added *ax* keyword argument to :func:`.pyplot.colorbar` and
:meth:`.Figure.colorbar` so that one can specify the axes object from
which space for the colorbar is to be taken, if one does not want to
make the colorbar axes manually.
* Changed ``cbook.reversed`` so it yields a tuple rather than a (index, tuple).
This agrees with the Python reversed builtin, and cbook only defines reversed
if Python doesn't provide the builtin.
* Made skiprows=1 the default on ``csv2rec``
* The gd and paint backends have been deleted.
* The errorbar method and function now accept additional kwargs
so that upper and lower limits can be indicated by capping the
bar with a caret instead of a straight line segment.
* The :mod:`matplotlib.dviread` file now has a parser for files like
psfonts.map and pdftex.map, to map TeX font names to external files.
* The file ``matplotlib.type1font`` contains a new class for Type 1
fonts. Currently it simply reads pfa and pfb format files and
stores the data in a way that is suitable for embedding in pdf
files. In the future the class might actually parse the font to
allow e.g., subsetting.
* ``matplotlib.ft2font`` now supports ``FT_Attach_File``. In
practice this can be used to read an afm file in addition to a
pfa/pfb file, to get metrics and kerning information for a Type 1
font.
* The ``AFM`` class now supports querying CapHeight and stem
widths. The get_name_char method now has an isord kwarg like
get_width_char.
* Changed :func:`.pcolor` default to ``shading='flat'``; but as noted now in
the docstring, it is preferable to simply use the *edgecolor* keyword
argument.
* The mathtext font commands (``\cal``, ``\rm``, ``\it``, ``\tt``) now
behave as TeX does: they are in effect until the next font change
command or the end of the grouping. Therefore uses of ``$\cal{R}$``
should be changed to ``${\cal R}$``. Alternatively, you may use the
new LaTeX-style font commands (``\mathcal``, ``\mathrm``,
``\mathit``, ``\mathtt``) which do affect the following group,
e.g., ``$\mathcal{R}$``.
* Text creation commands have a new default linespacing and a new
``linespacing`` kwarg, which is a multiple of the maximum vertical
extent of a line of ordinary text. The default is 1.2;
``linespacing=2`` would be like ordinary double spacing, for example.
* Changed default kwarg in `matplotlib.colors.Normalize` to ``clip=False``;
clipping silently defeats the purpose of the special over, under,
and bad values in the colormap, thereby leading to unexpected
behavior. The new default should reduce such surprises.
* Made the emit property of :meth:`~matplotlib.axes.Axes.set_xlim` and
:meth:`~matplotlib.axes.Axes.set_ylim` ``True`` by default; removed
the Axes custom callback handling into a 'callbacks' attribute which
is a :class:`~matplotlib.cbook.CallbackRegistry` instance. This now
supports the 'xlim_changed' and 'ylim_changed' Axes events.
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