Fix references to poet, see issue #13 (#41)

Poetry helps you declare, manage and install dependencies of Python projects,

ensuring you have the right stack everywhere.

![Poet Install](https://raw.githubusercontent.com/sdispater/poetry/master/assets/install.gif)

![Poetry Install](https://raw.githubusercontent.com/sdispater/poetry/master/assets/install.gif)

Also, be aware that the features described here are the goal that this library is aiming

for and, as of now, not all of them are implemented (but most of them are).

### Enable tab completion for Bash, Fish, or Zsh

`poetry` supports generating completion scripts for Bash, Fish, and Zsh.

See `poet help completions` for full details, but the gist is as simple as using one of the following:

See `poetry help completions` for full details, but the gist is as simple as using one of the following:

```bash

# Bash

A list of patterns that will be included in the final package.

You can explicitly specify to Poet that a set of globs should be ignored or included for the purposes of packaging.

You can explicitly specify to Poetry that a set of globs should be ignored or included for the purposes of packaging.

The globs specified in the exclude field identify a set of files that are not included when a package is built.

If a VCS is being used for a package, the exclude field will be seeded with the VCS’ ignore settings (`.gitignore` for git for example).

When installing packages, you can specify extras by using the `-E|--extras` option:

```bash

poet install --extras "mysql pgsql"

poet install -E mysql -E pgsql

poetry install --extras "mysql pgsql"

poetry install -E mysql -E pgsql

```

### `plugins`

def test_version():

    assert '{version}' == __version__

    assert __version__ == '{version}'

"""