[v2.5.0] File support

- Contribution guidelines changed
- The `Plugin` post-installation script type is now called a `Remote`
- Added the possibility to create a file
- Added the possibility to append to a file
- Downloaded post-installation scripts can now contain multiple post-installation types

More info about this release at this blog post

[2.2.0] Alternative packages

- various bug fixes
- improved test coverage
- allow alternative packages in the installation file

First public stable

This is the first stable version.
Features:

• Allow installation for both Fedora and Debian based distros
• Run post-installation scripts