Set default quality for rendering jpegs with PIL to 95.
Straw man commit for making the jpeg quality (when saved by PIL) configurable
via rcParams.
Added savefig.jpeg_quality to the rcParams correctly

With a short one-line doc in matplotlibrc.template.
added jpeg quality support for gdk backend
Added jpeg quality support for gtk backend
Added jpeg quality support for wx backend
bugfix: SetOption for wx.Image takes a string, not an int.
Two newline fixes to comply with PEP8