Add scaffold for image patch sampling.
Correct patch sampling.
Add KMeans.
Refactor k-means.
Add python bindings for k-means.
Compile python bindings with NDEBUG.
Add some checks.
Separate definition and implementation.
Merge branch 'master' into kmeans
Merge branch 'master' into kmeans

Conflicts:
	python/openann/cbindings.pxd
	python/openann/preprocessing.pyx
	python/setup.py.in
Use correct namespace.
Merge branch 'master' of github.com:OpenANN/OpenANN into kmeans
Merge branch 'master' of github.com:OpenANN/OpenANN into kmeans
Merge branch 'master' of github.com:OpenANN/OpenANN into kmeans
Merge branch 'master' of github.com:OpenANN/OpenANN into kmeans
KMeans implements Transformer interface.
Python bindings for sampleRandomPatches().
Add test case for k-means.
Merge branch 'kmeans' of github.com:AlexanderFabisch/OpenANN into kmeans
Merge pull request #128 from AlexanderFabisch/kmeans

Kmeans