fix jump input, add player interpolation

Assets/Scripts/Birb/Jump.cs

@@ -8,11 +8,20 @@ public class Jump : AbstractBehavior {
 	public float airJumpHeight = 5;
 	public int airJumpCount = 1;
 
+	bool jumpRequested;
+
 	int airJumpsMade = 0;
 
+	void Update() {
+		if (!jumpRequested && inputState.GetButtonPressed(inputButtons[0])) {
+			jumpRequested = true;
+		}
+	}
+
 	void FixedUpdate() {
-		if (inputState.GetButtonPressed(inputButtons[0])) {
+		if (jumpRequested) {
 			Activate();
+			jumpRequested = false;
 		}
 	}