Delay the remove of tactical sub until the explosion finishes.
Fix a minor eyesight bug.
Fix client desynchronization bug.
Fix minor bugs.
1. Add tacticalsub attack rewards.
2. Tacticalsub now cannot move once health<0
3. Entity now won't attack if target.heatlg<0
4. Entity now cannot chase target if loses sight.
5. Soldier health->1200, damage->150, speed->0.07
6. Tacticalsub health->600, damage->100, speed->0.09
7. Mothership health->3000, speed->0.03