Set the default build type to release

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%403784

examples/CMakeLists.txt

@@ -11,6 +11,16 @@ if(COMMAND cmake_policy)
    cmake_policy(SET CMP0003 NEW) 
 endif()
 
+
+#set default build type to Release
+if(NOT CMAKE_BUILD_TYPE)
+   set(CMAKE_BUILD_TYPE "Release" CACHE STRING
+      "Choose the type of build, options are: Debug Release
+      RelWithDebInfo MinSizeRel." FORCE)
+endif()
+
+
+
 PROJECT(examples)
 
 # add the folder containing the dlib folder to the include path