v0.1.6 - Burst weapon, refactor & fixes!

This version focused on refactoring few things & bug smashing!

Changelog:

• Feature: Burst weapon (shoot multiple projectiles in short time, before cooldown kicks in)
• Feature: Destroyed rooms can be restored if fully repaired 
• Feature: Show exact health points of rooms & ship 
• Change: Right mouse click, when weapon selected, clears it's target 
• Bug Fix: Shield not going down correctly after shield generator destruction 
• Bug Fix: Shield capacity wasn't set to zero after shield generator destruction 
• Bug Fix: Prevent shield generator from restoring capacity when destroyed 
• Bug Fix: Starting room HP was not always full 
• Refactor: A lot of elements was refactored!