add documentation in README.md

README.md

@@ -19,9 +19,13 @@ mkdir geomodel_work; cd geomodel_work
 ### Eigen
 
 git clone https://github.com/eigenteam/eigen-git-mirror.git
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 mkdir build_eigen; cd build_eigen
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 cmake ../eigen-git-mirror
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 sudo make install
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 cd ..
 
 ### XercesC
@@ -29,18 +33,27 @@ cd ..
 from http://xerces.apache.org/xerces-c/download.cgi download e.g. xerces-c-3.2.2.tar.gz
 
 tar zxvf xerces-c-3.2.2.tar.gz
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 mkdir build_xercesc; cd build_xercesc
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 cmake ../xerces-c-3.2.2
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 make -j
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 sudo make install
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 cd ..
 
 ### nlohmann
 
 git clone https://github.com/nlohmann/json.git
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 mkdir build_json; cd build_json
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 cmake ../json
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 sudo make install
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 cd ..
 
 ### GeoModel tool suite
@@ -50,37 +63,57 @@ Note: GeoModelVisualization requires Qt5 and other libraries. Please refer to th
 #### Clone and build GeoModelCore from source
 
 git clone https://gitlab.cern.ch/GeoModelDev/GeoModelCore.git
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 mkdir build_GeoModelCore; cd build_GeoModelCore
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 cmake ../GeoModelCore
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 make -j
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 sudo make install
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 cd ..
 
 #### Clone and build GeoModelIO
 
 git clone https://gitlab.cern.ch/GeoModelDev/GeoModelIO.git
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 mkdir build_GeoModelIO; cd build_GeoModelIO
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 cmake ../GeoModelIO
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 make -j
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 sudo make install
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 cd ..
 
 #### Clone geomodelvisualization and build gmex
 
 git clone https://gitlab.cern.ch/GeoModelDev/geomodelvisualization.git
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 mkdir build_geomodelvisualization; cd build_geomodelvisualization
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 cmake ../geomodelvisualization
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 make -j
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 sudo make install
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 cd ..
 
 ### Clone and build GeoModelTools
 
 git clone https://gitlab.cern.ch/GeoModelDev/GeoModelTools.git
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 mkdir build_GeoModelTools; cd build_GeoModelTools
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 cmake ../GeoModelTools
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 make -j
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 sudo make install
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 cd ..