Removed gfa calculation from csd example as gfa is not recommended for odfs as sharp as the csd ones
NF: Added automatic response estimation for CSD, added tests and updated example
NF: Updated EuDX to support coordinate systems with voxel origin at the corner or the center
RF: deleted old examples folder 0.5
DOC: renamed filename for snr estimation because it was too long
RF: updated the suggestions from the github review
BF: variable name corrected
TEST: updated test with the correct options for auto_response
Merge pull request #259 from Garyfallidis/release_0.7_cleanups

Release 0.7 a few cleanups