Create CMakeLists.txt

Adding functionality to build googletest from the root directory

CMakeLists.txt

+cmake_minimum_required(VERSION 2.6.2)
+
+project( googletest-distribution )
+
+enable_testing()
+
+option(BUILD_GTEST "Builds the googletest subproject" OFF)
+
+#Note that googlemock target already builds googletest
+option(BUILD_GMOCK "Builds the googlemock subproject" ON)
+
+if(BUILD_GMOCK)
+  add_subdirectory( googlemock )
+elseif(BUILD_GTEST)
+  add_subdirectory( googletest )
+endif()