googletest

Casts char to unsigned char before calling isspace() etc to avoid undefined behavior (by Zhanyong Wan); removes conditional #includes keyed on GTEST_HAS_PROTOBUF_ (by Zhanyong Wan); publishes GTEST_HAS_STREAM_REDIRECTION (by Vlad Losev); forward declares some classes properly (by Samuel Benzaquen); honors the --gtest_catch_exceptions flag (by Vlad Losev).