Create 538.mplstyle
Create bmh.mplstyle

Update 538.mplstyle

Update bmh.mplstyle

fixing line in bmh.mplstyle
remove dpi/figsize settings, rename to fivethirtyeight
add plotting examples

adding np and plt into script
more pep8
Merge pull request #3190 from CamDavidsonPilon/master

Adding two new styles to mplstyles