Fix memory leak when caching rotsprite

See merge request STJr/SRB2!745

Make flying TNTs' explosions not so laggy the first time

See merge request STJr/SRB2!746

Reset pmomz after applying it to momz

See merge request STJr/SRB2!747

Remove flight cutoff property

See merge request STJr/SRB2!748

Fix splitscreen player being unable to move

See merge request STJr/SRB2!749

This is the where the extreme lag when TNT Barrels explode came from. Probably
because the sprites are big and there's four of 'em! It shouldn't matter that
these aren't rotated--they're pretty round.

Don't draw yourself in first person!

See merge request STJr/SRB2!697

Fix crash when using -skipintro and the renderer is set to OpenGL from config

See merge request STJr/SRB2!714

Fix damagetype for Cybrak flamethrower.

See merge request STJr/SRB2!731

Fix the minecart angle thing in netgames

Closes #69

See merge request STJr/SRB2!732

Fix title card not showing up at all if focus lost

See merge request STJr/SRB2!736

Fix M_DrawNightsAttackMountains integer overflow

See merge request STJr/SRB2!737

Fix F_StartContinue fading out incorrectly in OpenGL

See merge request STJr/SRB2!738

Fix memory leak while chat is on screen

See merge request STJr/SRB2!743

Fix missing "RINGSNUMTICS" in dehacked.c's HUD items

See merge request STJr/SRB2!733

Only call P_CheckSurvivors() in tag gametypes

See merge request STJr/SRB2!740

# Conflicts:
#	src/g_game.c

This fixes 16/20 of the HUD items in dehacked.c being off by one
(Same case as the MFE_ flags thing)
Also fixes dehacked.c mentioning "LAPS", which doesn't exist

Put the (pull request repo owner) branch and commit in Appveyor EXE names

See merge request STJr/SRB2!725

Make the DMG actually *applied*. Consequence: flame will continue flying through player instead of dying in midair and dropping a flame, but this is actually desirable given the current behaviour looks kind of shitty.

Credit Tatsuru

See merge request STJr/SRB2!728

Fix fire shield being removed under lava

See merge request STJr/SRB2!729