Created by: claucece
In accordance with Mike Hamburg's paper.
- implement bigNumber arithmetic // merged
- implement the 3 decaf new functions: equality, encoding and decoding // merged
- implement the new scalar operations
- implement the new point operations // check if all are done
- change the point representation: projective coordinates
- implement a generator for the base point according to the new coordinates // this should be on otr4
- implement elligator2
- implement montgomery mul and use it on 'decode_long'