Removed axes from brain_extraction images
DOC: corrected figure name
DOC: Updated QB figure background
DOC: Modified EuDX angular parameter for better figures in example
Merge pull request #242 from Garyfallidis/pretty_lines

A new streamtube visualization method and different fixes and cleanups for the fvtk module
Added cc segmentation example
First draft of example + functions required
Readded examples
Cleaned + raised a question in the text
Fixed comments and added more ot the intro
Added the good intro this time
Retyped a bit of intro
One liner for masking
Added segmentation + automatic box
Removed function and cleanup
cleanup
cleanup
Fixed docstring
Changed tensorfit to TensorFit
Changed CFA to cfa after the first reference