The amount of rings you start with also applies when you respawn from a starpost.

Startrings counts the ring total requirement for a perfect bonus.

Drawangle fixes

Closes #153

See merge request STJr/SRB2Internal!236

Prevent just anyone from skipping credits but allow admins

See merge request STJr/SRB2!478

Pk3 Leaks

See merge request !500

ACZ hardcoding (including minecarts)

See merge request STJr/SRB2Internal!231

Stand(alone) lump comedy

See merge request !499

FOF slopes level load fix

See merge request STJr/SRB2!498

libopenmpt support

See merge request STJr/SRB2Internal!229

Fix warnings/errors found during compiling, mostly of the mixed-declaration-and-code or shadowed variables variety

Part 2 of fix, make sure copied slopes also pass on hasslope status to attached target sectors for FOFs

Also fix whitespace to use tab-style spaces instead of regular spaces, ew

Fix FOF slopes briefly glitching on level load in software mode, by ensuring the FOFs' target sectors have hasslope set on creation