Pushed version to 6.2

Starting to add speedometer into resourcepacks.

common/src/main/java/me/zacharias/speedometer/MissingPropertyException.java

@@ -0,0 +1,7 @@
+package me.zacharias.speedometer;
+
+public class MissingPropertyException extends Exception {
+    public MissingPropertyException(String field) {
+        super("Missing Speedometer config field: " + field);
+    }
+}