Merge remote-tracking branch 'origin/terencehill/vehicles_fixes'

Merge remote-tracking branch 'origin/terencehill/vehicles_fixes'

# By terencehill
# Via terencehill
* origin/terencehill/vehicles_fixes:
  Improve calculation of vehicle respawn delay
  Reset vehicles in reset_map (thanks to the new vehicles_reset function), not just in assault_new_round
  Fix serious bug when the map is reset (ready-restart) and a player is on a vehicle: player can't exit from the vehicle anymore
  If the spiderbot is blown up don't show the teleport effect where the spiderbot was
  Add blowup cvars for raptor and spiderbot
  Make racer_blowup() similar to raptor_blowup(): don't override respawn time (already correctly calculated in vehicles.qc) and don't call racer_spawn as it isn't necessary.
  Fix a few typos in function names
  Spawn vehicles according to g_start_delay and make work better g_vehicles_delayspawn_jitter (jitter 10 is now a random number in the interval [-5,+5] instead of [0,+10])