Add a notice for the SSE operations
Add a notice for the SSE operations

The implementation is based on a C++ library similar to Graphene called
`Vectorial`, written by Mikko Lehtonen, and licensed under the terms of
the two-clause BSD license.

criptych/graphene,criptych/graphene,ebassi/graphene,ebassi/graphene,criptych/graphene,criptych/graphene