Small logging improvements for addon loading

See merge request !272

Few small tweaks to the connection screen

See merge request !262

A few cvar default suggestions

See merge request !263

Discord joins now force menu close and title demo stop

See merge request !270

Adds back the "Loading file" message when a file is loaded
Adds individual file errors for things loaded with W_InitMultipleFiles (-file param)
Errors for a given file will now appear between "Loading file" and
the "Added file" or "not adding file" messages, making troubleshooting easier

Error checking for running out of freeslots

See merge request !267

This prevents wierdness from ahving the menu open on teh connection screen
It also prevents the connect command from erroring due to being in a demo

Uses loop variable to determine error condition
Also small change to lib_freeslot for SFX for consistent use of I_Error

Add my full name in the credits

See merge request KartKrew/Kart-Public!264

Increase timeouts by a few seconds, helps folks joining with slow disks
Beef up the vanilla downloader settings

Changed the confirmation prompt use MB if >=10MB
Changed the ovearall progress bar to use MB if >=10MB

Discord Invite Fixes + DUMPCONSISTENCY flag for makefile

See merge request !255

DRPC: Wait for join secret to be ready

See merge request !248

Replace gamma shortcut with a fullscreen toggle

See merge request !254

Fix unnecessary texture reloads on respawn in opengl

See merge request !251

Fix RA crash

See merge request !250

Fixes a crash that can happen when starting RA attempts if you press
keys/buttons that would cancel a netgame connection

If the join secret isn't ready right away, wait for the next update instead of trying to loop for it again immediately

I believe this may be the cause of the invite crash some people have noticed in master, but I'm not sure, needs tested.

Add large address aware flag

See merge request !246

This allows the final exe to use more than 2gb of RAM in a 64-bit system
which should get rid of most out of memory errors on 32-bit builds

Fix pausing then refocusing the window causing the music to stay muted

See merge request !244

If the game is paused, music will be resumed when unpause anyway.

R_FindPlane optimization

See merge request KartKrew/Kart-Public!242

Download files if they are found with wrong checksum

See merge request !238

Mute music instead of pausing if lose focus

See merge request !235

Command for http downloads with basic auth

See merge request !233

Fix servers having a long delay before starting

See merge request KartKrew/Kart-Public!236

Implement STUN for fetching your public IP address for RPC

See merge request KartKrew/Kart-Public!237