Known good ROM checksum database

[mroach]

Background

There are nice lists of known good ROM dumps with MD5 and/or SHA1 hashes.

For example dat-o-matic has a great dump in XML format that includes two pieces of information we'd need:

• ROM ID
• MD5

Tasks

(Maybe break this up into several tasks)

• Download the .dat file
• At build time, read the data file into go source code so that we don't have to distribute any files with the binary
• Allow a CLI flag to read a dat file from somewhere else so that uses can use their own and/or and updated list
• Add a check command to validate the hash of a single ROM
• In ls, add a --check flag to validate each ROM
• After a convert, automatically run a check to make sure we didn't botch the conversion somehow.