MultiNest repository change

The "official", and most up-to-date version of MultiNest has now moved from SourceForge to be publicly available on github here. I've updated the Docker files to use this new location. When I've tested this locally with PyMultiNest it seems to work fine.

containers/Dockerfile-test-suite-python27

@@ -48,10 +48,10 @@ RUN apt-get install -y libblas3 libblas-dev liblapack3 liblapack-dev \
 libatlas3-base libatlas-base-dev cmake build-essential gfortran
 
 # Install pymultinest
-RUN git clone https://github.com/JohannesBuchner/MultiNest \
-&& (cd MultiNest/build && cmake .. && make)
+RUN git clone https://github.com/farhanferoz/MultiNest.git \
+&& (cd MultiNest/MultiNest_v3.11_CMake/multinest && mkdir build && cd build && cmake .. && make)
 
-ENV LD_LIBRARY_PATH $HOME/MultiNest/lib:
+ENV LD_LIBRARY_PATH $HOME/MultiNest/MultiNest_v3.11_CMake/multinest/lib:
 
 # Install Polychord
 RUN git clone https://github.com/PolyChord/PolyChordLite.git \