fix mayavi
FIX show param in ica viz
DOC update contributing.rst for viz functions
FIX make rt_epochs.events numpy array
FIX use paranthesis instead of square brackets for shape
Merge pull request #1519 from mainakjas/fix_rt_events

FIX make rt_epochs.events numpy array
FIX add show param to plot_overlay
Merge pull request #1517 from mainakjas/fix_show

FIX show param in ica viz
deprecations for v0.9
TST : fix test_label_in_src
FIX : get rid of plot_topo_tfr in exampl