matplotlib Code

Merged revisions 6086,6365,6427-6428 via svnmerge from
https://matplotlib.svn.sourceforge.net/svnroot/matplotlib/branches/v0_91_maint

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r6086 | mdboom | 2008-09-11 15:28:11 -0500 (Thu, 11 Sep 2008) | 2 lines

Fix backticks in PS output.
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r6365 | mdboom | 2008-11-05 09:15:28 -0600 (Wed, 05 Nov 2008) | 1 line

Fix bug in zoom rectangle with twin axes
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r6427 | jdh2358 | 2008-11-21 05:14:12 -0600 (Fri, 21 Nov 2008) | 1 line

fixed poly between
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r6428 | jdh2358 | 2008-11-21 05:15:04 -0600 (Fri, 21 Nov 2008) | 1 line

fixed poly below
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fixed poly below

fixed poly between

Add an embryonic usage_faq.rst, based on a reply to a question on the list

Fix specification of gray level in slider_demo; thanks to Matthias Michler

reverted a bug I introduced when toying around with copy region in agg

added some helper functions for poly collections and masked regions

added save_background.py example.

added more comments.

cosmetic fixes