Added Valiant Tank
- Corrupted Tank
Fix Singularity Tank chance
Added new cvar
- ts_valiant_chance: defualt value 30. 0 - 100 integer value

Added Variant Tanks
- Void Tank
- Singularity Tank
- Fortress Tank
- Thunderstorm Tank
Moved Shift Tank to Variant Tank
Added Swift Tank
- Fix lag issue when tank spawned or used ability(hopefully)

-- wrong file

improved Hidden Tank

add more effects to the freezing tank

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fix Authority Tank effect glitch
change Illusion Tank. now will not extinguish when using skill

Added Freezing Tank
Improve effects.
- Earthquake/Explosive Tank effect will no longer be in the air when tank is on the high ground

fixes
- Fix Hellfire Tank where his rock sometimes doesn't ignited

Added Hidden Tank --- Beta state, might cause problems
- User can use command !noautho to remove this tank. in case encounter any problem.
- use cvar "ts_sudo_noautho" to prevent this tank from spawning