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 stix_fonts_demo.py fails with bad refcount

broken links in the gallery

This allows for multiple versions of the matplotlib documentation tobe made available.  The scheme is that the rootdocumentation (i.e.http://matplotlib.sf.net/) will always be thelatest stable version.  Other versions of the documentation will beavailable in subdirectories off of the root (the latest stable versionis merely a symlink or redirect back to the root).  This is the sameconvention used by "docs.python.org", as an aside.The index.html page uses some JavaScript to load a little snippet ofHTML from "/versions.html" that lists the available versions."versions.html" is not part of this repository, but is part of thematplotlib.github.com repository and is updated by hand whenever newversions are added or removed from the archive.  This approach allowsall versions of the documentation to point to all other versions ofthe documentation.  This JavaScript XMLHttpRequest magic doesn'thappen when the user is viewing static files on their local machine,and this is a happy coincidence.The perhaps controversial outcome of this change is that the summarylist of plotting commands is removed from the front page.  For one, wewant to steer people toward the version of the documentation thatcorresponds to the version they are running.  Also, this was amanually created list, and has become quite out of date over time.Better, IMHO, to link to the pyplot documentation.This freed up room to move much of the content that existed in thesidebar to the main body, where I feel it's much less buried.  I planto add a lot more external resources and links, so having the room todo this would be very helpful.Adds a "Fork me on Github" banner.

Support multi-version documentation on the website

…_masterConflicts:boilerplate.pylib/matplotlib/image.pylib/matplotlib/pyplot.py