muse : a promise based test system

All docs in muse/docs folder.

Build and test muse needs cmake and gtest.

• install cmake
• download gtest
• build gtest, generate the libgtest.a
• mkdir lib under gtest root folder, copy libgtest.a to lib
• modify the muse/project/build.sh, set the gtest_home_path to your gtest folder path.
• run build.sh to build and test muse