Buildsystem: Add helperscripts to detect SSE2 extensions, and optimize platform compileflags for the architecture

+ minifix in scripts (wrong includedir)

--HG--
branch : trunk

src/server/scripts/CMakeLists.txt

@@ -52,7 +52,7 @@ message("-- Added Script Library to SCRIPTS lib")
 
 include_directories(
   ${CMAKE_BINARY_DIR}
-  ${CMAKE_SOURCE_DIR}/dep/mersennetwister
+  ${CMAKE_SOURCE_DIR}/dep/SFMT
   ${CMAKE_SOURCE_DIR}/dep/zlib
   ${CMAKE_SOURCE_DIR}/src/server/shared
   ${CMAKE_SOURCE_DIR}/src/server/shared/Configuration