Netcode fixes the sequel

See merge request !207

Fix save games for a custom mod not saving to custom home folder

See merge request !209

Made a mistake in the directionchar branch. I'm pushing to master - naughty naughty - but nobody's around to stop me and it's my birthday c:

Autobrake & decoupling player sprite angle from camera angle

See merge request !69

Sprite2 MD2s and customisable defaulting

See merge request !115

Save cards and continue startinglives-balancing

See merge request !114

Titlemap

See merge request !97

MI misc whatever

See merge request !111

* Made drawangle updated when jumping off a wall as Knuckles.

* Make rope hangs change how they handle the player's angle a little more organically.

* cv_directionchar and cv_autobrake, and their secondplayer versions (both on by default) now exist.
* cv_useranalog is now hidden from the menu.
* Directionchar now attempts to face the camera direction when you're standing still, and handles a few other states with more decorum.
* Tailsbot is now slightly more capable of keeping up with Sonic.
* pflags rearranged/adjusted, combining a few non-simulstaneous ones and turning PF_NIGHTSFALL into CR_NIGHTSFALL.
* [unrelated to branch] all ground-impact based abilities now happen more consistently with quicksand.

* Clean up spr2 md2 code.
* Experimented but then commented out some stuff for homing attack.