RF - update csdeconv to use SphHarmFit class to reduce code duplication.
Started working on ellipsoid visualization
Added tensor function for tensor visualization as ellipsoids
Removed show from test
Added option to visualize the odfs with the color_fa color
Updated suggestions and examples
minor changes

modified:   ../dipy/tracking/eudx.py
modified:   ../dipy/tracking/propspeed.pyx
modified:   examples/reconst_dti.py
modified:   examples/segment_quickbundles.py
Merge pull request #217 from MrBago/csd-fit-classes

RF - update csdeconv to use SphHarmFit class to reduce code duplication.
Added clipping of odf in csa
Made fvtk.tensor more flexible. It can now colour with different scalar fields like the color_fa
TEST+DOC in ellipsoid and docs

Added tests for number of actors

modified:   ../dipy/viz/fvtk.py
modified:   ../dipy/viz/tests/test_fvtk.py

Added docs for color_fa normalization of the ellipsoids
and clipping of the csaofs to be positive

modified:   examples/reconst_csa.py
modified:   examples/reconst_dti.py
This code currently fails.

This is because of some silly bugs in dti.py. Going next to fix that.
BF: Use `iterable` to determine if sigma is a sequence.
Merge pull request #222 from arokem/fix_restore_bug

BF - Fix restore.
Fix make examples for windows.
Merge pull request #223 from matthieudumont/fix_makeexamples_windows

Fix make examples for windows.
Merge pull request #212 from Garyfallidis/fvtk_ellipsoid

NF+BF - Tensor visualization.
Fix warningS error