Adding rcParams option for axis.labelpad
Updating matplotlibrc.template
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
Make the "fraction" kwarg behave as it did before recent LightSource enhancements
Strip whitespace and strict PEP8 compliance
Avoid potential divide by zero in LightSource.hillshade
fix typo in figlegend_demo.py

otherwise y4 never gets used
Fix calculation of aspect for hillshading.
Make clipping work properly for effectively planar surfaces
Added tests for LightSource functionality
Added example of using the custom hillshading on a 3D surface plot
PEP8 fixes
Avoid leaking file descriptors in tests and examples
BUG: 3 fixes for widgets (MultiCrusor, SpanSelector, Slider)
Fix #3298.  Wedge's shouldn't special case the "round the horn"
Update demo_floating_axes.py
Update demo_floating_axes.py