BF - fix fit-tensor handling of file extensions and mask=none
RF - minor cleanup
Merge pull request #190 from MrBago/bf-fit-tensor

BF - fix fit-tensor handling of file extensions and mask=none
RF - move const to class level
DOC: add reference section to ProbabilisticOdfWeightedTracker
DOC: adress comments by Stefan about acronym and reference formatting
Merge pull request #196 from mekman/add_ref

DOC: add reference section to ProbabilisticOdfWeightedTracker
DOC - feedback from pull requset 191
FIX: testfail due to Non-ASCII character \xe2
Merge pull request #189 from MrBago/shm-small-fixes

BUG - Small fixes to SHM
Merge pull request #199 from mekman/add_ref

FIX: testfail due to Non-ASCII character \xe2 in markov.py
Merge pull request #191 from MrBago/fx-assume-normed

DOC - clarify docs for SphHarmModel
RF - rename spherical harmonic bases to be more clear and expose sh-model coefficients as property
BF: corrected lateral problem in test_shm after the rebase
Merge pull request #201 from Garyfallidis/rename-sph-basis-functions

RF - Rename SPH basis functions.
fixed typos in Mic's name as well as mine
reverted a custom python2 fix to the original version
Merge pull request #202 from samuelstjean/typos

Typos
RF: Rename tensor statistics to remove "tensor_" from them.

They are all in the dti module after all.
Merge pull request #203 from arokem/tensor_rename

RF: Rename tensor statistics to remove "tensor_" from them.