inverting an axis shouldn't affect the autoscaling setting
Renamed all instances of variables named "long" to "lon" to avoid clobbering by 2to3
Remove NO_DEPRECATED flag -- this was accidentally committed.
Added a test for #1553
Remove redundant ob_refcnt's that cause crashes when built in DEBUG mode.
Fix #1583: Crash with text.usetex=True and plt.annotate -- usetex bounding boxes are all NaNs when text is empty.
new MatplotlibDeprecationWarning class

In light of the fact that Python builtin DeprecationWarnings are ignored
by default as of Python 2.7 (see link below), this class was put in to
allow for the signaling of deprecation, but via UserWarnings which are
not ignored by default.

http://docs.python.org/dev/whatsnew/2.7.html#the-future-for-python-2-x

Prior to this commit:

```
In [1]: %pylab

Welcome to pylab, a matplotlib-based Python environment [backend: agg].
For more information, type 'help(pylab)'.

In [2]: mlab.liaupunov([1,2], np.diff)
Out[2]: 0.0
```

After this commit:
```
In [1]: %pylab

Welcome to pylab, a matplotlib-based Python environment [backend: agg].
For more information, type 'help(pylab)'.

In [2]: mlab.liaupunov([1,2], np.diff)
/home/pi/.local/lib/python2.7/site-packages/matplotlib/mlab.py:1212:
MatplotlibDeprecationWarning: This does not belong in matplotlib and
will be removed
  mDeprecation) # 2009/06/13
Out[2]: 0.0
```
more complete fix for #1583 (multiple spaces)
Merge pull request #12 from ivanov/annotate_space

more complete fix for #1583 (multiple spaces)
Merge pull request #1583 from mdboom/annotate_space

Crash with text.usetex=True and plt.annotate
Fix the xlim of polar plots
Make font_manager ignore KeyErrors for bad fonts
Merge pull request #1603 from mdboom/polar_range

ylim=0.0 is not well handled in polar plots
Merge pull request #1557 from WeatherGod/invert_autoscale

inverting an axis shouldn't affect the autoscaling setting
Merge pull request #1604 from dmcdougall/fix_badfonts

Make font_manager ignore KeyErrors for bad fonts
Merge pull request #1532 from mdboom/ob_refcnt_fix

CXX/Python2/cxx_extensions.cxx:1320: Assertion `ob_refcnt == 0'
import new deprecation class as mplDeprecation
Merge pull request #1596 from ivanov/mpl-deprecation-warnings-1.2.x

new MatplotlibDeprecationWarning class (against 1.2.x)