Fixing path issues for CMTK Parcellate dilated ROI files
Removed ipdb trace
Added GenerateDirections, FindShPeaks, Directions2Amplitude interfaces
wrapping gendir, find_SH_peaks and dir2amp mrtrix commands.

Also fixed issues with out_filename argument for all interfaces
make DataGrabber and SelectFiles use human order
Fixed a copy/paste error.
Added tests.
Updated new mrtrix interfaces to new out_file format
updated CHANGES log
added dummy files for testing new mrtrix interfaces
autogenerated tests
Merge pull request #745 from chrisfilo/enh/human_order_datagrabber

make DataGrabber and SelectFiles use human order
fix: construct sparse matrix using topological sort order
Merge branch 'master' into fix/sparse_matrix

* master:
  Added tests.
  Fixed a copy/paste error.
  make DataGrabber and SelectFiles use human order
  Update indexsidebar.html
  Fixed Frontiers citation
  Update .travis.yml
Merge pull request #738 from swederik/bf/parcellate

BF: Fixing path issues for CMTK Parcellate dilated ROI files
Merge pull request #747 from satra/fix/sparse_matrix

fix: construct sparse matrix using topological sort order
fixed possible values for -datatype parameter of tracks2prob interface.
Previous values were in error. correct values obtained from:
http://www.brain.org.au/software/mrtrix/general/formats.html#datatypes
Merge remote-tracking branch 'origin/pr/739'

Conflicts:
	CHANGES
Fixed test files import.