Add serialization and deserialization
Remove unneeded code and dependencies
Fix compilation warnings
Add sanity checks
Use unordered_map from std instead of std::tr1
Allow non-consecutive disk IDs

Source: https://sourceforge.net/p/dadisi/code/8/tree/trunk/dadisi/

Silence warning in bundled fmt: https://github.com/fmtlib/fmt/issues/1267