Mahotas

* Fix fill_polygon bug (fix by joferkington)
* Fix Haralick feature 6 (fix by Rita Simões)
* Implement morph.get_structuring_element for ndim > 2. This implies that
functions such as label() now also work in multiple dimensions
* Add median filter & rank_filter functions
* Add template_match function
* Refactor by use of mahotas.internal
* Better error message for when the compiled modules cannot be loaded
* Update contact email. All docs in numpydoc format now.

* Add `max_points` & `descriptor_only` arguments to mahotas.surf
* Fix haralick for 3-D images (bug report by Rita Simões)
* Better error messages
* Fix hit&miss for non-boolean inputs
* Add `label()` function

* Fix bug in ``cwatershed()`` when using return_lines=1
* Fix bug in ``cwatershed()`` when using equivalent types for image and
markers
* Move tests to mahotas.tests and include them in distribution
* Include ChangeLog in distribution
* Fix compilation on the Mac OS (patch by K-Michael Aye)
* Fix compilation warnings on gcc

* Improve ``mahotas.stretch()`` function
* Fix corner case in surf (when determinant was zero)
* ``threshold`` argument in mahotas.surf
* imreadfromblob() & imsavetoblob() functions
* ``max_points`` argument for mahotas.surf.interest_points()
* Add ``mahotas.labeled.borders`` function

* Fix memory leak in _surf
* More robust searching for freeimage
* More functions in mahotas.surf() to retrieve intermediate results
* Improve compilation on Windows (patches by Christoph Gohlke)

* Release the GIL in morphological functions
* Convolution
* just_filter option in edge.sobel()
* mahotas.labeled functions
* SURF local features