matplotlib/matplotlib: v2.0.0

Major release of Matplotlib This release completely overhauls the default style of the plots. Highlights include: 'viridis' is default color map instead of jet. Modernized the default color cycle. Many more functions respect the color cycle. Line dash patterns scale with linewidth. Change default font to DejaVu, now supports most western. alphabets (including Greek, Cyrillic and latin with diacritcs), math symbols and emoji out of the box. Faster text rendering. Improved auto-limits. Ticks out and only on the right and bottom spines by default. Improved auto-ticking, particularly for log scales and dates. Improved image support (imshow respects scales and eliminated a class of artifacts).