Use char type for circle_perimeter method for speedup
Use same cython directives for whole source file
Fix PEP8 issues
Merge pull request #412 from ahojnnes/draw-cython-directives

ENH: Some improvements to draw.
Merge branch 'master' of git://github.com/scikit-image/scikit-image

Conflicts:
	skimage/draw/_draw.pyx
Merge branch 'master' of git://github.com/scikit-image/scikit-image
fix comment
FIX: number of peaks returned from feature.corner_peaks

corner_peaks accepted a num_peaks argument, but the call
to peak_local_max inside the function used np.inf instead
of the value of this keyword argument, leading to an unbounded
number of peaks being returned.
DOC: minor fix ellipse_perim.
FEAT: Full 3d anisotropic implementation of marching cubes

Also includes surface area calculation algorithm from
generated mesh.
Convenient output to visualize with `mayavi.mlab`.
Efficient Cython implementation.
import `marching_cubes` and `mesh_surface_area`
add _marching_cubes.pyx to list of Cython modules to build
fix import of _marching_cubes
fix: bug in second `_append_tris` call in case 125
Replace scipy.ndimage routine with skimage.ndimage.rotate
Use nearest neighbour interpolation to avoid different labels
Remove unused import
Replace rotate function of local binary pattern example with builtin skimage function
Explicitly import local_binary_pattern function
Replace ndimage.zoom function in radon transform example with builtin skimage function