added dominantColor function

[MarkOtten]

dominantColor(arg) returns the color that appears most often in an image, the specified integer argument is the number of pixels to skip per iteration, while iterating through an image.

[coveralls]

Coverage increased (+0.06%) to 98.366% when pulling ecc39bb on MarkOtten:master into a65f608 on EyalAr:master.

[coveralls]

Coverage increased (+0.06%) to 98.366% when pulling 6d78151 on MarkOtten:master into a65f608 on EyalAr:master.

[kudos]

Shouldn't it be "dominantColor"? Love the change though, hopefully this lands in a release soon :)

[MarkOtten]

I was thinking "the color that dominates the picture" when I initially wrote the function, though that could have been the middle of the night lack of sleep more than anything else. I will update it to dominantColor and push it when I get a chance.

[coveralls]

Coverage increased (+0.06%) to 98.366% when pulling bee413e on MarkOtten:master into a65f608 on EyalAr:master.

[coveralls]

Coverage increased (+0.06%) to 98.366% when pulling e6c898e on MarkOtten:master into a65f608 on EyalAr:master.