This allows removing the AmmoItemData array.
Also make some tweaks to handle the nnext extension for customizable ammo amount given. Instead of tying it to gModernMap this now also uses a feature flag that will later be exposed to RMAPINFO.
* Use `maphoriz(-11)` instead of some voodoo degree amount so it's clear when comparing sources.
* Don't stop interpolating while doing Ramses.
* Apply Ramses pitch amount to `nVertDestPan`, just like the original.
* Don't reset all angles when initialising Ramses, just set the yaw angle.
* Don't return player's view to center when doing Ramses, use the delta between `nDestVertPan` and the player's pitch, using same formula as original.
* Comment in how normal/non-ramses `nDestVertPan` setting should be 8x the sprite Z move delta, not 2x. I know it's not correct, but its been this way for a long time and we probably should CVAR it.
* When doing the player's death pitch, it's 40.156 degrees (horizon of 108), not 38 degrees (horizon of 100). This was a misread of mine way back when.
This disables the boss's death in L4 ending the game and just advances to the next level.
This seems to be the intent with this mod as the second episode starting at L5 is not defined and the first episode's subtitle advertises the full game.
This was the result of some gross change to the spawning code which suddenly changed the rules about minibosses.
To reduce the impact, it is only enabled for the "Alien World Order" maps.
* E1L7 abuses an 'end the game' command to progress to E2L1, this needs special treatment.
* handle ENDGAME.MAP more cleanly by injecting an 'engine.con' into the compilation chain to define its map record. The main issue with this is that it needs to be defined before the regular CONs run.
* check the already defined 'clearinventory' and 'clearweapons' flags that are exposed through RMAPINFO (Duke/RR only so far.)
Tying the start-of-episode cutscene to the cluster does not really work because it gets triggered by all maps of the cluster.
All currently existing intro cutscenes are tied to the map anyway.
Also correcting transition movie name for RRRA E2L1.
* fixed frame gaps when exiting a cutscene. This must be properly synchronized with the state handler in the main loop.
* reactivated the loading screens. With texture precaching working the delay when loading a map becomes significant enough to require a visual feedback.
* RR does not play 'bonusmusic' on its summary screen.
