renamed pylab examples dir to fix import breaks
cleaned up some imports to accord with coding guide
Describe polar-plot-specific zooming/panning.
forgot to plot circles in last plot (bluemarble background)
some ports of the old locators and formatters to the new api
don't use runtime_library_dirs on windows
add expand_vertical and expand_horizontal flags
remove trailing whitespace
moved intro into separate doc
some more doc updates
