Installing ISAACConfigVersion.cmake, fixing issue #59

Author: theZiz

lib/CMakeLists.txt

@@ -4,3 +4,4 @@ project (isaac)
 install( FILES "${CMAKE_CURRENT_SOURCE_DIR}/isaac.hpp" DESTINATION "include" )
 install( DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/isaac" DESTINATION "include" PATTERN "mainpage.dox" EXCLUDE )
 install( FILES "${CMAKE_CURRENT_SOURCE_DIR}/ISAACConfig.cmake" DESTINATION "lib/cmake/ISAAC" )
+install( FILES "${CMAKE_CURRENT_SOURCE_DIR}/ISAACConfigVersion.cmake" DESTINATION "lib/cmake/ISAAC" )