Default values

[sewnie]

In regards to this comment, XDG enforcer for steam should have default values, because this only makes it optional, allowing the user to set certain variables of where the steam files go. This isn't an XDG enforcer, but a directories enforcer not without hard setting or retrieving them from environmental variables such as XDG_DATA_HOME with their default values.

[davidebeatrici]

In addition to implementing default values, I should probably rename the project.