message: Resolve /bigobj error on appveyor
  ```
  C:\projects\segs\Projects\CoX\Servers\MapServer\ScriptingEngine.cpp : fatal error C1128: number of sections exceeded object file format limit: compile with /bigobj [C:\projects\segs\build\Projects\CoX\Servers\MapServer\MapServer.vcxproj]
  Command exited with code 1
  ```
  solution via:
diff: @@ -6,6 +6,9 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
  IF(MSVC)
  add_definitions( -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS -DNOMINMAX -D_USE_MATH_DEFINES)
  + if(CMAKE_BUILD_TYPE EQUAL "Debug")
  + set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /bigobj")
  + endif()
  ELSEIF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pedantic -Wall -Wextra -Wuseless-cast -std=c++14")
  ELSEIF("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
  