Opponents next action indicator

Finally i found some time to dig into the code a little, and implemented the opponents next action indicator.

Currently indicator has 4 states; 

1- Incoming attack, when opponent plays an attack type card, 

2- Shield Charge Detected - when opponent plays defensive shield charge cards, 

3 -  Receiving Special Signature - when opponent plays an special card which the effect is unknown

4 - Error - happens when its undetectable etc..