Fixes compatibility with Visual Age versions lower than 9.0 (by Hady Zalek); updates the release notes.

Fixes comments and tests for the moment of generator parameter evaluation in INSTANTIATE_TEST_CASE_P.

Fixes a -Wextra warning in gtest-param-util.h and updates the cmake script to verify it (by Zhanyong Wan); adds support for hermetic build to the cmake script (by Vlad Losev).

Renames ThreadStartSempahore to Notificaton (by Vlad Losev);  adds threading tests for SCOPED_TRACE() (by Vlad Losev);  replaces native pthread calls with gtest's threading constructs (by Vlad Losev);  fixes flakiness in CountedDestructor (by Vlad Losev);  minor MSVC 7.1 clean-up (by Zhanyong Wan).

Adds threading support (by Miklos Fazekas, Vlad Losev, and Chandler Carruth); adds wide InitGoogleTest to gtest.def (by Vlad Losev); updates the version number (by Zhanyong Wan); updates the release notes for 1.5.0 (by Vlad Losev); removes scons scripts from the distribution (by Zhanyong Wan); adds the cmake build script to the distribution (by Zhanyong Wan); adds fused source files to the distribution (by Vlad Losev and Chandler Carruth).