remove nv12toyuv_buffer old-commit-hash: e0cd3bf5fc56229c2a0b835d0ef43a0bf683bfa5
* mv to tools/replay * change folder * add .gitignore * fix build doc * disable warning * enable warning after build * build qt/util.cc qt/api.cc to library * cleanup old-commit-hash: fd5b3d76036b78864111790931a3abcb1d11ee0f