Sugaru

The same as in part 1 plus remove pyyaml as an extra dependency (pyyaml is the main dependency for now).

- pyyaml is now installed as dependency by default
- Readme dependencies section update

Thanks to Vova's grandmother from Yaroslavl as well.

- Pictures' links update (after making the project public)
- Improve readme a bit

Basic components:

- File Loader
- Section Encoder
- Plugin Executor
- Section Decoder
- File Writer
- Object Loader

Documentation and examples are also included.