v2.0.0b1

First beta release of v2.0.0

This previews the new default style and many bug-fixes. A full list of
the style changes will be collected for the final release.

In addition to the style change this release includes:

• overhaul of font handling/text rendering to be faster and clearer
• many new rcParams
• Agg based OSX backend
• optionally deterministic SVGs
• complete re-write of image handling code
• simplified color conversion
• specify colors in the global property cycle via 'C0',
  'C1'... 'C9'
• use the global property cycle more places (bar, stem, scatter)

There is a 'classic' style sheet which reproduces the 1.Y defaults:

import matplotlib.style as mstyle
mstyle.use('classic')