writeProcComments is now member of Function, at it has an ostream based overload, also added gmock framework to dependencies

src/tests/comwrite.cpp

@@ -0,0 +1,14 @@
+#include "dcc.h"
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+TEST(CowriteTest, HandlesZeroInput) {
+  EXPECT_EQ(1, 1);
+}
+
+int main(int argc, char** argv) {
+  // The following line must be executed to initialize Google Mock
+  // (and Google Test) before running the tests.
+  ::testing::InitGoogleMock(&argc, argv);
+  return RUN_ALL_TESTS();
+}