Add a 30 second invincibility period after spawning

[ickylevel]

On tank vs tank gameplay, if there is a spawn, there are chances that someone will camp that spawn to make easy kills. It happens on the advance and secure servers because the fight is concentrated in a relatively small area. A simple invicibility timer at spawning would address this issue (not to mention that the tank spawns before we can control it).

 

PS:

Clouds are the cause of stuttering