matplotlib Code

Fix SVG text rendering bug affecting Mozilla-based viewers.

array of indices as integers in hexbin

Add hexbin to one more place in boilerplate.py

removed dead code from end of colorbar.py

Added hexbin axes method and pyplot function by Michiel de Hoon.
Tracker 1952339.

Fixed bug in last commit

Alternative fix for ps backend bug; removes superfluous gsave/grestores.

fixed a ps path collection bug where cliprect and clipapth are none

Fix invalid title string that broke ps output

Handle changed dpi in quiver; remove extra draw in print_figure.
There is still a dpi-related problem with mathtext in the QuiverKey label.