Funge-98 Roman Numerals
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### Fingerprint 0x524f4d41 ('ROMA')
After successfully loading ROMA, the instructions `C`, `D`, `I`, `L`,
`M`, `V`, and `X` take on new semantics.
- `C` pushes 100 onto the stack.
- `D` pushes 500 onto the stack.
- `I` pushes 1 onto the stack.
- `L` pushes 50 onto the stack.
- `M` pushes 1000 onto the stack.
- `V` pushes 5 onto the stack.
- `X` pushes 10 onto the stack.
Note that these are just digits, you still have to do the arithmetic
yourself. Executing `MCMLXXXIV` will not leave 1984 on the stack. But
executing `MCM\-+LXXX+++IV\-++` should.