v0.06

Got the bulk of the upgraded drone project done here. This unit can be set to stay at the selected position, or follow and be directed by the player like normal. They'll break from that to chase down mobs in their range, and then return there. 

Added:

• Tier 2 drones (Ctrl-Q, costs 25 energy)
• Stay command (Hold left click -> E), cancel with E
• Energy bar (fills up blue, from collecting atoms)

To do:

• Input logic like when to move the Stay position or ignore certain commands
• Tier 1 and 2 specific input, attacking while locked on