Binarization and convolution bug fix
Performance tests

* Probably incanter matrix is not a big deal.
* Try to use vector of vectors and update functions.
Changes in the main data structure; vector of vectors
Different namespace for bufferedimage
A map function that for each element of an Image matrix
Generic function to multiply vectors
Basic processing functions now use the mat structure
Improvements on the convolution function
Fixed the convolution function; color space conversions
Improvements on the conversion to BufferedImage
First complete test of the new mat structure

* The results were impressive! The library is much faster now!