Moved the generateLFSRConsts into a static initializer.

I also needed to make the keys be added in 'reverse' order to be
consistent with the specifications in the paper.
Implemented the key schedule algorithm.
Made the whitening keys populate the array properly (backwards).

This is so that the other parts of the algorithm in this implementation
are more consistent with the implementation given in the HIGHT paper.
Added the initial transform of the plaintext using the whitening keys.