Merge branch 'feature/Coupling' into 'master'

CMakeLists.txt

cmake/FindCwipi.cmake

cmake/ThirdPartyCwipi.cmake

cmake/ThirdPartyFFTW.cmake

cmake/thirdparty-patches/cwipi_fix-compile.patch

docs/refs.bib

docs/user-guide/solvers/dummy.tex

docs/user-guide/solvers/solvers.tex

docs/user-guide/xml/xml-coupling.tex

docs/user-guide/xml/xml.tex

library/LibUtilities/BasicUtils/ErrorUtil.hpp

library/LibUtilities/BasicUtils/FieldIOXml.cpp

library/LibUtilities/BasicUtils/SessionReader.cpp

library/LibUtilities/CMakeLists.txt

library/LibUtilities/Communication/Comm.h

library/LibUtilities/Communication/CommCwipi.cpp

library/LibUtilities/Communication/CommCwipi.h

library/LibUtilities/Communication/CommMpi.cpp

library/LibUtilities/Communication/CommMpi.h

library/LibUtilities/Communication/CommSerial.cpp