Add MCUtils helper

This will be used by my next commit. But trying to get the build going
since CI blew up

Spigot-Server-Patches/MC-Utils.patch

@@ -0,0 +1,123 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Mon, 28 Mar 2016 20:55:47 -0400
+Subject: [PATCH] MC Utils
+
+Collection of utils to help reduce NMS diff
+
+diff --git a/src/main/java/net/minecraft/server/MCUtil.java b/src/main/java/net/minecraft/server/MCUtil.java
+new file mode 100644
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000
+--- /dev/null
++++ b/src/main/java/net/minecraft/server/MCUtil.java
+@@ -0,0 +0,0 @@
++package net.minecraft.server;
++
++import org.bukkit.Location;
++
++import java.util.regex.Pattern;
++
++public class MCUtil {
++    private static final Pattern REPLACE_QUOTES = Pattern.compile("\"");
++
++    private MCUtil() {}
++
++
++    /**
++     * Builds a chat componenent from a string.
++     * @param str
++     * @return
++     */
++    public static IChatBaseComponent cmpFromMessage(String str) {
++        return IChatBaseComponent.ChatSerializer.a("{text:\"" + REPLACE_QUOTES.matcher(str).replaceAll("\\\"") + "\"}");
++    }
++
++    /**
++     * Calculates distance between 2 entities
++     * @param e1
++     * @param e2
++     * @return
++     */
++    public static double distance(Entity e1, Entity e2) {
++        return Math.sqrt(distanceSq(e1, e2));
++    }
++
++
++    /**
++     * Calculates distance between 2 block positions
++     * @param e1
++     * @param e2
++     * @return
++     */
++    public static double distance(BlockPosition e1, BlockPosition e2) {
++        return Math.sqrt(distanceSq(e1, e2));
++    }
++
++    /**
++     * Gets the distance between 2 positions
++     * @param x1
++     * @param y1
++     * @param z1
++     * @param x2
++     * @param y2
++     * @param z2
++     * @return
++     */
++    public static double distance(double x1, double y1, double z1, double x2, double y2, double z2) {
++        return Math.sqrt(distanceSq(x1, y1, z1, x2, y2, z2));
++    }
++
++    /**
++     * Get's the distance squared between 2 entities
++     * @param e1
++     * @param e2
++     * @return
++     */
++    public static double distanceSq(Entity e1, Entity e2) {
++        return distanceSq(e1.locX,e1.locY,e1.locZ, e2.locX,e2.locY,e2.locZ);
++    }
++
++    /**
++     * Gets the distance sqaured between 2 block positions
++     * @param pos1
++     * @param pos2
++     * @return
++     */
++    public static double distanceSq(BlockPosition pos1, BlockPosition pos2) {
++        return distanceSq(pos1.getX(), pos1.getY(), pos1.getZ(), pos2.getX(), pos2.getY(), pos2.getZ());
++    }
++
++    /**
++     * Gets the distance squared between 2 positions
++     * @param x1
++     * @param y1
++     * @param z1
++     * @param x2
++     * @param y2
++     * @param z2
++     * @return
++     */
++    public static double distanceSq(double x1, double y1, double z1, double x2, double y2, double z2) {
++        return (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2) + (z1 - z2) * (z1 - z2);
++    }
++
++    /**
++     * Converts a NMS World/BlockPosition to Bukkit Location
++     * @param world
++     * @param pos
++     * @return
++     */
++    public static Location toLocation(World world, BlockPosition pos) {
++        return new Location(world.getWorld(), pos.getX(), pos.getY(), pos.getZ());
++    }
++
++    /**
++     * Converts an NMS entity's current location to a Bukkit Location
++     * @param entity
++     * @return
++     */
++    public static Location toLocation(Entity entity) {
++        return new Location(entity.getWorld().getWorld(), entity.locX, entity.locY, entity.locZ);
++    }
++}
+--