First quick implementation of BRIEF Feature descriptor
Allowing arbitrary descriptor sizes in BRIEF
Removing hard-coding in BRIEF code
User-specified output ratio

Added a keyword argument which enables the user to select other ratios for the output image rather than
just 1:1.
Corrected indentation and spacing.
Corrected indents (4space instead tab).
Corrected indents Again.
Documented another easy way to build scikit-image for virtualenv users.
Added usage example.
Edited after Stefan's comments.
Okay, I think I got the rst syntax this time...
Adding custom sampling seed, Normal sampling mode
Added docs and used numpy trickery to filter keypoints
Changed dtype of hamming dist matrix and added docs
Fixing indentation
Outsource inner brief loop into cython file
Outsource inner brief loop into cython file
Merge branch 'ankit-brief' of https://github.com/ahojnnes/scikit-image into ahojnnes-ankit-brief
Clearing docs and making feature.util
Removing unused import and fixing indentation issue