Add dense DAISY feature description.
PEP8 style corrections.
Better Sphinx documentation.
Add circle perimeter to draw module.
Add DAISY visualization + example plot.
Handle all non-float images.
Move set_color() to draw module.
No need to normalize angular smoothing.
Fixed submodule import.
ENH: Added support for python3 in travis build
BUG: Python 3 Travis build caught this error
BUG: Failed exposure tests on Python3, fixed
STY: Used float comparison in test_exposure
STY: Change minor formatting to test travis build
Improve total-varation denoising algorithm

Implementation of fast split-Bregman optimization algorithm in Cython. This
implementation also fixes the previously broken 3D version, which darkened
the images.
Fix test cases for TV denoising
Remove old implementation if TV filter
Update denoising example for new TV implementation
Replace manual array with builting Cython buffer indexing
Rename denoise_tv to denoise_tv_bregman