Added a transformation to the binary query.
For _bisect_right() function, a transformed x is passed. The transformation
will replace the characters after h hash length with '1's.

Used random_projections module.
GuassianRandomProjections in random_projections module is used to perform the
hashing for Random projections LSH method.
Used random_projections module.
GuassianRandomProjections in random_projections module is used to perform the
hashing for Random projections LSH method.