Added PlayerToggleSprint event and sprinting related API.

src/main/java/org/bukkit/event/player/PlayerToggleSprintEvent.java

@@ -0,0 +1,34 @@
+package org.bukkit.event.player;
+
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+
+/**
+ * Called when a player toggles their sprinting state
+ */
+public class PlayerToggleSprintEvent extends PlayerEvent implements Cancellable {
+    private boolean isSprinting;
+    private boolean cancel = false;
+
+    public PlayerToggleSprintEvent(final Player player, boolean isSprinting) {
+        super(Type.PLAYER_TOGGLE_SPRINT, player);
+        this.isSprinting = isSprinting;
+    }
+
+    /**
+     * Gets whether the player is now sprinting or not.
+     *
+     * @return sprinting state
+     */
+    public boolean isSprinting() {
+        return isSprinting;
+    }
+
+    public boolean isCancelled() {
+        return cancel;
+    }
+
+    public void setCancelled(boolean cancel) {
+        this.cancel = cancel;
+    }
+}