Initial port of Control.js and Navigation.js.

This also adds an Events instance to the map, so the Navigation control can register events on the map.

Tests still missing.

src/ol/control/Control.js

@@ -0,0 +1,66 @@
+goog.provide('ol.control.Control');
+
+goog.require('ol.Map');
+
+
+/**
+ * @constructor
+ * @param {boolean|undefined} opt_autoActivate
+ */
+ol.control.Control = function(opt_autoActivate) {
+    
+    /**
+     * @type {ol.Map} map
+     * @private
+     */
+    this.map_ = null;
+
+    /**
+     * @type {boolean} active
+     * @private
+     */
+    this.active_ = false;
+    
+    /**
+     * Activate this control when it is added to a map.  Default is false.
+     *
+     * @type {boolean} autoActivate
+     */
+    this.autoActivate_ =
+        goog.isDef(opt_autoActivate) ? opt_autoActivate : false;
+};
+
+/**
+ * @return {ol.Map} getMap
+ */
+ol.control.Control.prototype.getMap = function() {
+    return this.map_;
+};
+
+/**
+ * @param {ol.Map} map
+ */
+ol.control.Control.prototype.setMap = function(map) {
+    this.map_ = map;
+    if (this.autoActivate_) {
+        this.activate();
+    }
+};
+
+/**
+ * @return {boolean}
+ */
+ol.control.Control.prototype.activate = function() {
+    var returnValue = !this.active_;
+    this.active_ = true;
+    return returnValue;
+};
+
+/**
+ * @return {boolean}
+ */
+ol.control.Control.prototype.deactivate = function() {
+    var returnValue = this.active_;
+    this.active_ = true;
+    return returnValue;
+};