Add mpi setup script

Sherpa/release/SHERPA-MC-2.2.2/bl1/setupMPI.sh

+
+VERSION=$1
+module load mpi/mpich-x86_64
+mkdir /code && cd /code && \
+    wget http://www.hepforge.org/archive/sherpa/SHERPA-MC-${VERSION}.tar.gz && \
+    module load mpi && tar xzf SHERPA-MC-${VERSION}.tar.gz && cd SHERPA-MC-${VERSION} && ./configure --enable-mpi --enable-pythia --prefix=/usr/local --enable-ufo --enable-hepmc2=/usr/local --enable-rivet=/usr/local CXXFLAGS=-std=c++11 && make install -j 8  && make clean