0.1.7: 1. It is updated according to changes in the compiler Rust.

2. Add edition=2018.
3. Documentation is updated.
4. The code of a plug-in is rewritten and optimized.
5. Examples 'use, panic' are rewritten, the example of benchmarking is added.
6. Updating of the license according to 2019, the English version of a name of the developer is added.
7. 'Travis.yml' fix, 'Cargo.toml' description corrected.