aISIS Upgrade

Players who donate to their squad now also provide raw materials to their aISIS unit.  When enough Nano Packs are donated, the player can upgrade their aISIS - each level of upgrade provides +1 HP to the marine.

e.g. Player A donates a Tech Level 5 item which provides the squad with 25 NP.  This also provides a matching amount of NP to aISIS.

Upgrades are performed from the COMMAND BASE screen.