Handle observables and fires augments in plugins

This makes it easier to switch themes.

apidoc/plugins/observable.js

@@ -12,7 +12,7 @@ exports.handlers = {
 
   parseComplete: function(e) {
     var doclets = e.doclets;
-    var cls, doclet, i, ii, observable;
+    var cls, doclet, event, i, ii, observable;
     for (i = 0, ii = doclets.length - 1; i < ii; ++i) {
       doclet = doclets[i];
       cls = classes[doclet.longname.split('#')[0]];
@@ -41,6 +41,13 @@ exports.handlers = {
         if (cls.observables.indexOf(observable) == -1) {
           cls.observables.push(observable);
         }
+        if (!cls.fires) {
+          cls.fires = [];
+        }
+        var event = 'ol.ObjectEvent#event:change:' + name;
+        if (cls.fires.indexOf(event) == -1) {
+          cls.fires.push(event);
+        }
       }
     }
   }