Another Pyrocar rebalances

[FortyTwoFortyTwo]

• Removed flat 8 flame damage, now deals same flame damage as normal backburner.
• Starting from 0 seconds, taking direct flame damage increases afterburn duration by 0.15 sec, to a max of 10 seconds.
• Minicrits become crits now only applies during rage
• Right-click for gas now instantly throws one instead of replacing jetpack to gas passer weapon
• Increase damage requirement for gas for 225 to 350
• Reduce max able to carry gas from 5 to 3
• Thermal Thruster now starts with empty charge meter during setup
• Thermal Thruster now takes 20 seconds to fully recharge, from approx 18 seconds