Define initial player info to use.
Remove bloat.
Rename variables for clarity.
Remove magic numbers.
Create ROM validator class.
Use ROM validator class.
Make log messages more consistent.
Remove console log messages.
Create ROM class.
Update comment in prep. for coming changes.
Unrequire unused classes.
Improve comment.
Throw exception in 'impossible' situation.
Require ROM class.
Make rom-loader class return a rom instance, not a file.
Expect and store ROM instead of file in main.js
Start loading maps when ROM is present, not when file is present.
Fix scope issue.
Define key function.
Remove old unused logic for storing and loading rom maps.