System for netsyncing unlocks, inspired by but with nowhere near as many moving parts as (STJr/SRB2!1756).
* `gamedata->unlocked[MAXUNLOCKABLES]` is duplicated to `netUnlocked[MAXUNLOCKABLES]` (or all `true` in `dedicated`
* New `local` boolean for M_SecretUnlocked
* Removed last vestiges of SRB2 special stage token code because it occupied the spot in the netsave we wanted to use.
* Correct typing of multiple `m_cond` functions that returned `boolean` constants as `UINT8`s.
Completely clientside, unlike SECRET_SKIN. Followers have no gameplay function, and it saves us having to write even more to our demos/netsaves. Replaces SECRET_WARP.
Also:
- Now don't apply skins or followers from profiles if the skin is locked - instead, get the closest skin in stats. (Same function as from demos!)
- If you're looking at a profile and the skin or follower are locked, make them solid colour (TC_BLINK).
- Don't show the ring cursor before you've selected a profile.
- Fixes defaulting to follower id 0 (previously chao, currently hot robo) when joining a server without going through the menu flow
- No need to store TWO names for a follower, so save a little memory
- Should make it easier to add unlockable followers later
- Followers now have categories, definable in SOC
- New character select step: Follower category
- "None" is a category, just skips straight to Follower None
- Select a category to go to the previous regular follower selection step
- Press the C/Extra button to reset a character select step to its "default"
- Character: Center the character in the engine class (goes from [0,1] to [1,1], etc)
- Character alts: Centers the "primary" alt (prefers Eggman over Eggrobo)
- Skincolor: Centers the character's prefcolour
- Follower category: Centers on the "None" option
- Follower: [CURRENTLY NO BEHAVIOUR]
- Followercolor: Cycles between follower's defaultcolour, "Match", and "Opposite"
- ANGLELAG lets you set how fast the followers swivel around. Default is 8*FRACUNIT, old behavior can be returned with FRACUNIT.
- Followers reverse their angle when you hold the lookback button.
- All lag values can't go below FRACUNIT instead of 1.
