Refactored LightSource.shade_rgb into three separate functions
Added support for vertical exag and non-uniform spacing to LightSource
Added new blending modes to LightSource for more realistic rendering
Updated shading example to show new styles and added exmaple DEM from SRTM data
restored default boxplot style and respect for the sym kwarg
fixed typos/formatting in docstrings
clean up whitespace
BUG : fix errors when using fliers

doplot for horizontal boxes (internal bxp helper function) assumes that
it will be passed an even number of positional arguments which it swaps
pair-wise.  The code to draw the fliers also passes in a format string
which breaks the assumption.

 - re-worked how `bxp` deals with the `sym` input
 - minor pep8
BUG : handle colors passed in via sym in bxp

If the user passes is the string 'ro' assume they want filled circles.
This is also the old behavior.
DOC : added warning to doc of get_window_extent

This is in response to issues raised in #2831.

Closes #3055
BUG : fixes broadcast errors with np 1.9

 fixes some of the issues raised in #3186
BUG : fix the rest of the errors from np 1.9

 Addresses the remaining errors from #3186
Create 538.mplstyle
Create bmh.mplstyle

Update 538.mplstyle

Update bmh.mplstyle

fixing line in bmh.mplstyle
TST : drop 3.2, add 3.4
DOC : tweaked references to python versions
remove dpi/figsize settings, rename to fivethirtyeight
Fix plot directive when used with multiple options.

The existing template produces newlines between options, which were
confusing the reST parser. By fiddling with whitespace control, the
template can be made to put things together correctly.
DOC : fixed errors in docstrings
add plotting examples

adding np and plt into script