Make-to-batch

Changelog

- Fixed an error on the CLI option parsing: if the `--output` option was set without a 'parent directory' (for example `dest.bat` instead of `./dest.bat`), the tool crashed
- Added support for inline make calls using `$(MAKE)` or `${MAKE}`

Changelog

- Added comments' parsing
- Added support for 'cp' command

In this version, a more powerful parser has been added: the tool is now capable of recognizing the options in commands and converts them in the batch equivalents. Furthermore, a new command is now recognized (`ls`).

**:warning: Warning:** The output batch file may be incorrect due to the incompatibility of some commands: a revision is suggested.

Changelog

- Added the `mkdir` equivalent (`MKDIR`)
- Added some useful files for contributing (like `CONTRIBUTING.md`)
- Added docstrings to every class, method and function

> This is the first working version of the tool. It's still rudimentary.
>
> – From `v0.1.1`'s release notes

**:warning: Warning:** The output batch file may be incorrect due to the incompatibility of some commands: a revision is suggested.

This is the first working version of the tool. It's still rudimentary.

Note that the version code is `v0.1.1` (and not `v0.1.0`) because this project is an evolution of a previously existing project I worked on.

**:warning: Warning:** The output batch file may be incorrect due to the incompatibility of some commands: a revision is suggested.