Jupyter kernelspec files

Add generation of Jupyter kernelspec files to support Root & CbmRoot classes in Python3. Generation is performed by cmake and the files are placed at <build/install>/share/jupyter/. Some documentation is provided in docs/jupyter.

cmake/modules/CbmGenerateConfig.cmake

 macro(generate_config_files)
-
-  # generate config files used for build directory
-  WRITE_CONFIG_FILE(config.sh)
-  WRITE_CONFIG_FILE(config.csh)
-
-  # generate config files used for installation directory 
-  SET(ROOT_INCLUDE_PATH 
-      ${ROOT_INCLUDE_PATH} 
-      "${CMAKE_INSTALL_PREFIX}/include" 
-      "${CMAKE_INSTALL_PREFIX}/include/mvd"
-      "${CMAKE_INSTALL_PREFIX}/include/littrack"
-      "${CMAKE_INSTALL_PREFIX}/include/KF"
-      "${CMAKE_INSTALL_PREFIX}/include/AnalysisTree"
-      "${CMAKE_INSTALL_PREFIX}/include/AnalysisTreeQA"
-     )
-
-  set(CMAKE_INSTALL_LIBDIR lib)
-  SET(VMCWORKDIR ${CMAKE_INSTALL_PREFIX}/share/cbmroot)
-
-  WRITE_CONFIG_FILE(config.sh_install)
-  WRITE_CONFIG_FILE(config.csh_install)
-
-  Install(FILES ${CMAKE_BINARY_DIR}/config.sh_install
-          DESTINATION bin
-          RENAME CbmRootConfig.sh
-         )
-
-  Install(FILES ${CMAKE_BINARY_DIR}/check_system.sh
-          DESTINATION bin
-         )
-
-  Install(FILES ${CMAKE_BINARY_DIR}/config.csh_install
-          DESTINATION bin
-          RENAME CbmRootConfig.csh
-         )
-
+        # generate config files used for build directory
+        WRITE_CONFIG_FILE(config.sh)
+        WRITE_CONFIG_FILE(config.csh)
+        WRITE_KERNEL_FILE(CbmRootPy/kernel.json)
+
+        # generate config files used for installation directory
+        SET(ROOT_INCLUDE_PATH
+                ${ROOT_INCLUDE_PATH}
+                "${CMAKE_INSTALL_PREFIX}/include"
+                "${CMAKE_INSTALL_PREFIX}/include/mvd"
+                "${CMAKE_INSTALL_PREFIX}/include/littrack"
+                "${CMAKE_INSTALL_PREFIX}/include/KF"
+                "${CMAKE_INSTALL_PREFIX}/include/AnalysisTree"
+                "${CMAKE_INSTALL_PREFIX}/include/AnalysisTreeQA"
+        )
+
+        set(CMAKE_INSTALL_LIBDIR lib)
+        SET(VMCWORKDIR ${CMAKE_INSTALL_PREFIX}/share/cbmroot)
+
+        WRITE_CONFIG_FILE(config.sh_install)
+        WRITE_CONFIG_FILE(config.csh_install)
+        WRITE_KERNEL_FILE(CbmRootPy/kernel.json_install)
+
+        Install(FILES ${CMAKE_BINARY_DIR}/config.sh_install
+                DESTINATION bin
+                RENAME CbmRootConfig.sh
+        )
+
+        Install(FILES ${CMAKE_BINARY_DIR}/check_system.sh
+                DESTINATION bin
+        )
+
+        Install(FILES ${CMAKE_BINARY_DIR}/config.csh_install
+                DESTINATION bin
+                RENAME CbmRootConfig.csh
+        )
 endmacro()