try not use fft
feature orientation completed
iter-octave name changed
DogSpace added with ndarray interface
use dogspace instead
kd-tree and nn-search added
Root and Node added
kdtree generated
kdtree docs added
nn-search on kdtree finished
kdtree matching added
nn-search on kdtree added
nn-search fixed
kd-tree matching worked
kdtree matching cached
kd-tree and nn-search tested
bare bone blur util added
blur test added
blur bug finally fixed, such stupid bug
gaussian pyramid modified