Merge branch 'master' into feature/fieldconvert

CMakeLists.txt

cmake/FindGSMPI.cmake

cmake/FindXXT.cmake

cmake/NektarCommon.cmake

cmake/ThirdPartyMPI.cmake

docs/html/doxygen/doxygen

docs/html/doxygen/doxygen-fixed-width.css

library/Demos/LocalRegions/LocHexExpDemo.cpp

library/Demos/LocalRegions/LocHexExpDemo_2.cpp

library/Demos/LocalRegions/LocPrismExpDemo.cpp

library/Demos/LocalRegions/LocPrismExpDemo_2.cpp

library/Demos/LocalRegions/LocProject1D.cpp

library/Demos/LocalRegions/LocProject2D.cpp

library/Demos/LocalRegions/LocProject3D.cpp

library/Demos/LocalRegions/LocProject_Diff1D.cpp

library/Demos/LocalRegions/LocProject_Diff2D.cpp

library/Demos/LocalRegions/LocProject_Diff3D.cpp

library/Demos/LocalRegions/LocPyrExpDemo.cpp

library/Demos/LocalRegions/LocPyrExpDemo_2.cpp

library/Demos/LocalRegions/LocTetExpDemo.cpp