Build configuration cleanup

First pass:

• Stripping unneeded comments and cmake code
• Relocated config script generation to src/config/CMakeLists.txt

Second pass:

• Further stripping of unneeded comments and cmake code in main CMakeLists.txt and subdirectories
• Formatting of cmake code
• Set GenericDetectors package version to NPDet version
• Set default CMAKE_INSTALL_PREFIX and CMAKE_BUILD_TYPE

src/ConceptDetectors/JLEIC/CMakeLists.txt

 cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
 
-FIND_PACKAGE(DD4hep REQUIRED COMPONENTS DDRec DDG4)
-
-if( DD4hep_CMAKE_FILES_PATH )
-  include ( ${DD4hep_CMAKE_FILES_PATH}/DD4hep.cmake )
-else()
-  include ( ${DD4hep_DIR}/cmake/DD4hep.cmake )
-endif()
-
 #-----------------------------------------------------------------------------------
-
-SET(a_lib_name JLEIC )
+set(a_lib_name JLEIC)
 
 dd4hep_configure_output()
 dd4hep_package (${a_lib_name} MAJOR 0 MINOR 0 PATCH 1
-  USES         [ROOT   REQUIRED COMPONENTS Geom GenVector] 
-               [DD4hep REQUIRED COMPONENTS DDCore DDRec]
-  OPTIONAL     XERCESC
-  INCLUDE_DIRS include )
+    USES         [ROOT   REQUIRED COMPONENTS Geom GenVector] 
+                 [DD4hep REQUIRED COMPONENTS DDCore DDRec]
+    INCLUDE_DIRS include
+    )
 
-#-----------------------------------------------------------------------------------
 dd4hep_add_plugin(${a_lib_name} SOURCES src/*.cpp)
-#dd4hep_install_dir(compact DESTINATION ${DD4hep_DIR}/examples/ClientTests)
-#-----------------------------------------------------------------------------------
 
-install(DIRECTORY compact/ DESTINATION share/${PROJECT_NAME}/${a_lib_name}
-        FILES_MATCHING PATTERN "*.xml")
-
-#dd4hep_configure_scripts(JLEIC DEFAULT_SETUP)
-
-
-#set(exename recon_test)
-#message("DD4hep_LIBRARIES : ${DD4hep_LIBRARIES}")
-#add_executable(${exename} src/${exename}.cxx)
-#target_link_libraries(${exename} ${DD4hep_LIBRARIES} ${DD4hep_DDREC_LIBRARY} )
-#install(TARGETS ${exename}
-#  # IMPORTANT: Add the bar executable to the "export-set"
-#  EXPORT ${PROJECT_NAME}Targets
-#  RUNTIME DESTINATION "${INSTALL_BIN_DIR}" COMPONENT bin)
+#-----------------------------------------------------------------------------------
+install(DIRECTORY compact/
+    DESTINATION share/${PROJECT_NAME}/${a_lib_name}
+    FILES_MATCHING PATTERN "*.xml"
+    )