add ATLASStyle for matplotlib
add example to plot graph, improve ATLAS style, adapt plot_matplotlib_hist.py
Merge remote-tracking branch 'upstream/master'
hide importing mpl inside the function
clean code
minor changes to plotting style examples and include legend.frameon=False in matplotlib ATLAS style
Merge pull request #1 from ndawe/wiso-master

minor changes to plotting style examples and legend.frameon=False for ATLAS style
merge [s|g]et_style_mpl and [s|g]et_style
Merge pull request #2 from ndawe/wiso-master

merge [s|g]et_style_mpl and [s|g]et_style
Merge pull request #223 from wiso/master

ATLAS style for matplotlib