Moving snippets from "README.md" to "examples" folder

[runiorr]

I found it a little confusing to read through all the examples in the README file. Perhaps if it were organized by topics in the examples folder it would be easier and more intuitive for beginners to learn. Like the following structure:

.
└── examples/
├── hello_world/
│ ├── main.py
│ └── main.rs
├── types/
│ ├── main.py
│ └── main.rs
└── lists/
├── main.py
└── main.rs

[rochacbruno]

this can be covered on #49