Save image to sd card and actually send it to rails.

Right now we default to sending to user with id 1 until we have real auth system
Merge pull request #17 from benrudolph/modify-upload-url

Save image to sd card and actually send it to rails.
Added filter library
Filters working on image. So far only one filter, more to come
The MapleGaussianFilter
Added Posterize filter and changed name to MapleFilter
Merge pull request #19 from benrudolph/image-filtering

Image filtering
Save photo after it has been filtered
Merge pull request #23 from benrudolph/save-filtered-image

Save photo after it has been filtered