Option to disable file version checking?

[MightyPork]

I'm trying to parse a schematic for the purpose of building BOM in a custom format.

I tried cloning the repo and changing "EESchema Schematic File Version 4" to "EESchema Schematic File Version 5" and it worked without any problems to get all components. Incidentally, the old code in Master uses "EESchema Schematic File Version 2" but after changing it to "EESchema Schematic File Version 4", it also worked fine for a v4 project.

Making the version optional or less strict could make the library much more usable. It errors out on wrong file version already, so I if it fails somewhere deeper due to format changes, it's not any worse than this.