fix shiftlock when shiftlockcentertarget is disabled

prevent shiftlockcentertarget from affecting normal thirdperson camera (non-shiftlock)

respect changes to convar roblox_cam_angle_y and roblox_cam_angle_p from outside roblox camera

add cvar roblox_cam_face_velocity if player should face velocity, not input. add cvar roblox_cam_face_speed to change how fast player faces input/velocity

fix opening spawnmenu in firstperson

improve vehicle aiming

added camera thirdperson offsets, fixed firstperson when server host was in thirdperson, prevent camera from going through/partially inside walls

update roblox camera rotation when exiting first person

fixed 1 frame glitch of wrong camera rotation when entering first person, added cvar roblox_cam_look_camera_more if set faces character where camera is looking in vehicles (possibly more cases in the future), made roblox_cam_maxdist a Float, fixed check for singleplayer, improved camera raycast filters, fixed accidental dependency on DLib, fixed physgun rotation mode (only in first person so far), possibly more...

fixed check on shiftlock when roblox_cam_dist was between 0 and 1