FIX TEST:  add load/tests/__init__.py
DOC:  make mne example more interesting
ENH UTS dimension:  error message for invalid time windows
API:  ndvar.properties --> ndvar.info
ENH plot:  more .set_vlim() and .set_cmap() methods

to be fixed in next commit: permanent change of camp and vlim in plot.topo.butterlfy
ENH plot:  replace Colorspace class with info dict entries