median filter outlier
histogram example
Find contours example
Fix imread from urls on some backends.

Some backends infer the image type from the extension. This fix just adds the extension to the temp filename.
Updated Implementation of Roberts Algorithm
Upadated Version with test added(/filter/tests/test_edge.py
ENH: Add `chelsea` to dataset.
Merge pull request #524 from stefanv/chelsea

ENH: Add `chelsea` to dataset.
updated tests for Roberts Edge Detector
BUG: Fix integer type in Felzenwalb cython.
Merge pull request #515 from tonysyu/fix/imread-url-bug

ENH: Fix imread from urls on some backends.
Merge pull request #525 from stefanv/felzenwalb_32

BUG: Fix integer type in Felzenwalb cython.
fix travis complaint
readability
Updated function names[Robert's Edge Detection]
Merge pull request #526 from sciunto/fixtravis
temporarily use Cython 0.18 to restore normal Travis builds
Final Roberts Edge Detector
Merge pull request #527 from JDWarner/tempfix_use_old_cython

TST: Temporarily use Cython 0.18 to restore normal Travis builds.
Clean, and implemented using horse.jpeg