Correct CMake namespace to match documentation.

Correct the namespace added to the package in the CMake build-system installation. Instead of jsonfortran-<compiler_id> it is now simply jsonfortran.

Author: EmilyBourne

packaging/CMakeLists.txt

@@ -1,5 +1,5 @@
 install ( EXPORT ${PACKAGE_NAME}-targets
-  NAMESPACE ${PACKAGE_NAME}::
+  NAMESPACE ${PROJECT_NAME}::
   DESTINATION "${EXPORT_INSTALL_DIR}" )
 
 include ( CMakePackageConfigHelpers ) # Standard CMake module
@@ -54,4 +54,4 @@ install(FILES
 if(MSVC_IDE)
    INCLUDE_DIRECTORIES("src")
    SET(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fpp")
-endif()
+endif()