Combine Sniper upgrades

[ceu160193]

2 small suggestions:

- max energy upgrade should increase cloak energy (or another one can be added)
- sniper rounds should penetrate enemies, if health of unit being shot was below damage of round. Of course, with every enemy penetrated damage goes down.

[toasty54]

Perhaps you can research something such as 'Ion shot stabilization'? Maybe it can be an auto-cast spell that allows you to penetrate NPC's with a lowering damage rate with each material it passes. Let's say the spell takes around 10 mana with every penetration shot used.