Merge branch 'master' into fix/single-mode

CHANGELOG.md

CMakeLists.txt

VERSION

cmake/ThirdPartyCCM.cmake

cmake/ThirdPartyMetis.cmake

cmake/ThirdPartyTetGen.cmake

cmake/ThirdPartyTriangle.cmake

docs/developer-guide/library-design/library-design.tex

docs/user-guide/installation/doc.tex

docs/user-guide/installation/installation.tex

library/Collections/BwdTrans.cpp

library/Collections/Collection.cpp

library/Collections/Collection.h

library/Collections/CollectionOptimisation.cpp

library/Collections/CollectionOptimisation.h

library/Collections/IProduct.cpp

library/Collections/IProductWRTBase.cpp

library/Collections/IProductWRTDerivBase.cpp

library/Collections/Operator.h

library/Collections/PhysDeriv.cpp