Get 2.2(.0) release ready

Closes #461

See merge request STJr/SRB2Internal!615

Lengthen credits for msuic parity

See merge request STJr/SRB2Internal!620

Update SRB2 Community Contributors list for Revan's Nimbus Ruins skybox.

See merge request STJr/SRB2Internal!621

Add "Press ENTER to skip..." text to the intro's first scene

See merge request STJr/SRB2Internal!619

Date stuff

See merge request STJr/SRB2Internal!618

Signpost fixes

See merge request STJr/SRB2Internal!602

Add "Press ENTER to skip..." text to the intro's first scene, for new players who might otherwise sit through a load of (polished) crap. :P

Small analog mode fixes

See merge request STJr/SRB2Internal!604

Fix F12 issues

Closes #356 and #377

See merge request STJr/SRB2Internal!616

OpenGL cast to float, not store in double

See merge request STJr/SRB2Internal!617

Remove unnecessary function parameters from title card code

See merge request STJr/SRB2Internal!603

Update comments in the config on when main assets/patch.pk3 hashes have been updated (I know MS is going to update the hashes again later, but this'll still be valid to have done then).