FIX: Projection __repr__
FIX: return projections as Projection instance
ENH: plot topomaps
ENH: add viz.plot_evoked_topomap()
FIX: avoid circular import
TEST plot_evoked_topomap
FIX: address github comments
FIX:  plot_topomap axes handling
ENH:  add plot_evoked_topomap example
STY:  plot_evoked_topomap example
ENH plot topomaps:  plot sensors as points
ENH plot_evoked_topomap():  accept sequence of time points
OPT: data indexing in topomap plot
ENH:  incorporate pl.show() in plot_evoked_topomap()
ENH (WIP):  coordinate handling when plotting topomaps
ENH : add default times in topomap (@agramfort)
ENH : adding plot_projs_topomap function with example
ENH:  add Evoked.plot_topomap() method
ENH  topomap plotting:  merge grad channels using RMS
FIX address comments,  better errors,  TESTs