Added a new Prism Proximity Mine Pickup item and a few fixes to 1.7 content. 

New Items

• Pickup: Proximity Mine  - The PRISM Proximity Mine forms part of your standard-issue kit for ground combatants. As demonstrated during Orientation, the mine is best utilized during retreat or securing a perimeter. Once activated and placed on the ground, the mine will scan for any movement within a radius around itself, and detonate upon detecting such movement.

Balance 

• Player - Reduced base Stamina Regen
• Player - Increased max and base player speed slightly
• Pickup: Hive Swarm - Updated to use more responsive firefly hatchlings
• Auxiliary: Swarm - Updated to use more responsive firefly hatchlings
• Auxiliary: Pyro Pod - Increased pod health 
• Mutation: Spinal Integrator - Added -25 resistance stat

Fixes

• Fixed Pyro MK1 droid having 100% Pyro Champion spawn chance
• Fixed Tesla Droids still having a Tesla Champion death explosion
• Fixed Hivemind boss exit teleport fade breaking sometimes
• Fixed +2 Grenade Container skill mod being multiplied by DNA mods
• Act 1 new loot zone level fixes