*player->health (formerly the "HUD" health) is now to be known as player->rings, and now acts as the player's actual ring count
*player->mo->health (formerly rings + 1) is now always 1 when alive, regardless of ring count; if player with rings is damaged, this is untouched
Damage in normal SP/Coop gameplay has been tested and still works fine; still a lot of mess to clear up though
Tag damaging probably is broken now, I'll fix this later
Angles now go from 0 to 0xFFFF (360 degrees == FRACUNIT) instead
of using a full UINT32. Lua only has one number type, so signedness
gets in the way of using angle_t directly. This handling of angles
matches up with how ZDoom ACS scripting and the like does it.
I also changed all the integer casts and pushes of fixed_t to
their own macro in preperation for possible future seperation.
