v0.3.1

Updates:

• Added better indication of how far away the closest ports are. 
  • First arrow appears at greater than 6.5
  • Second arrow appears at greater than 50
  • Third arrow appears at greater than 150
  • Fourth arrow appears at greater than 300
• Added in game indication of button to press when you near a port and want to enter (e).

Thoughts/Observations:

• While the arrow indicators are a better indicator than what I had before, the numbers themselves don't really mean anything, as that value isn't directly connected to amount of fuel, ect. I'll still need a better way to explain what the distance means in relation to whether or not you could make it on the fuel you have.