Updated README.rst - References & MPI (#539)
Updated README.rst - References & MPI (#539)

Rearranged REFERENCES section to the end. Removed MPI example.

Co-authored-by: Sergey Pokhodenko <74006e78d6bda46d46ab630817998ee2213ebe67@gmail.com>

IntelLabs/hpat,IntelLabs/hpat,IntelLabs/hpat,IntelLabs/hpat