Add support for versions `0x200` and `0x300` of the RFF format (Blood)

[cher-nov]

• 0x200 - Blood Shareware Beta Build 0.91 (aka "Blood Demo"), Blood Shareware 0.99 (the initial release).
• 0x300 - Blood 1.00 (resolves #1723).

See also: http://dukertcm.com/knowledge-base/downloads-rtcm/blood-shareware/ https://www.classicdosgames.com/game/Blood.html