Add clean.sh and compile_and_test_all.sh, ignore built libraries/tests/data,

and make the unit tests exit with non-zero status when tests fail.


git-svn-id: https://cld2.googlecode.com/svn/trunk@162 b252ecd4-b096-bf77-eb8e-91563289f87e

internal/cld2_unittest.cc

@@ -359,7 +359,7 @@ int RunTests (int flags, bool get_vector) {
   }
 
   FinishHtmlOut(flags);
-  return 0;
+  return any_fail ? 1 : 0;
 }
 
 }       // End namespace CLD2