v1.3.4

Removed the qa directory, adjusted the file structure, and updated the README.
There is no change in the content of node.sh.

The files located under env/general are used in the normal CPU environment,
and those located under env/intel-sgx are used in the Intel sgx CPU environment.

Files shasum 256 hash:

b4d38a94d7807b9d2fe71b8aa47fb39bbe371256cdc25f695a956e6eabf0e377  env/general/node.sh
76d07d8fbca33f83553aefb75ef7971165acfe517d2750f0b148223023b8ee52  env/general/config.toml

bf29583465d10915a7293cb7ac309e510d7cefd7063180bd3deaa895ea259f87  env/intel-sgx/node.sh
fa0349860aaf8f7381587d149e01c88a7643c6f585aac8ee3a02e9a607f22108  env/intel-sgx/config.toml