WIP: Add appveyor
ENH: Add testing dataset
FIX: Fix command
FIX: Less verbose download
FIX: logging verbosity
ENH: Add nibabel
Merge pull request #1685 from Eric89GXL/appveyor

ENH: Add appveyor
FIX: Update readme
ENH: centralize polhemus data readers

Fixed their references
ADD test for polhemus readers
Remove specific hsp/elp reader

This parsing is easily done with np.loadtxt. Code updated accordingly.
FIX _set_dig_neuromag for _kit2fiff_gui
Check shape when reading file
PEP8
ADD set_dig_points
FIX import, minor errors
UPDATE test_set_apply_dig_points
ENH: address shape check
FIX set, COSMITS
ADD SetChannelMixin