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.
new method: ellipse_perimeter
add myself to contributors
remove print statement
remove brackets
fix for master
fix docstring
add test point position circle-ellipse
Merge branch 'ellipse' of github.com:sciunto/scikit-image into ellipse

Conflicts:
	skimage/draw/_draw.pyx