Interface for 'Mode' of diffusion tensor maps
Updated Tensor Mode interface to use latest dipy tensor code
Documentation updates, PEP8, reworked output naming
Updated CHANGES
Added Ennis citation to class documentation
Fixed package_check for dipy tensor mode interface
fixed doctest
Merge branch 'enh/tensor_mode'
Merge remote-tracking branch 'upstream/master' into fix/ants

* upstream/master:
  fixed doctest
  Fixed package_check for dipy tensor mode interface
  Added Ennis citation to class documentation
  Updated CHANGES
  Documentation updates, PEP8, reworked output naming
  Updated Tensor Mode interface to use latest dipy tensor code
  Interface for 'Mode' of diffusion tensor maps