matplotlib Code

Add more hatch styles. Improve consistency across backends.

added marginal density option to hexbin

update release number

update version number

add fulldisk aeqd example.

Create a PdfFile wrapper named PdfPages to act as the target of savefig
to avoid saving figures in png format onto the file-like PdfPages object.

Remove extra line from backend_pdf.draw_tex

Fix a bug in pdf usetex: allow using non-embedded fonts

Fix crash rendering verbose message

Add some comments for clarification