Merge pull request #183 from hughperkins/update-gtest-link

Update gtest link to point to github

Author: TimmyLiu

src/tests/gtest.cmake

@@ -40,8 +40,8 @@ else()
 
   ExternalProject_Add(
     gtest-external
-    URL http://googletest.googlecode.com/files/gtest-1.7.0.zip
-    URL_MD5 2d6ec8ccdf5c46b05ba54a9fd1d130d7
+    URL https://github.com/google/googletest/archive/release-1.7.0.zip
+    URL_MD5 ef5e700c8a0f3ee123e2e0209b8b4961
     PREFIX ${prefix}
     BINARY_DIR ${binary_dir}
     CMAKE_CACHE_ARGS