Get rid of stability annotations and document stability with api

This change adds a stability value to the api annotation, with
'experimental' as default value.

enum, typedef and event annotations are never exportable, but
api annotations are needed there to make them appear in the
docs.

Nested typedefs are no longer inlined recursively, because the
resulting tables get too wide with the current template.

src/ol/dom/input.js

@@ -31,7 +31,6 @@ ol.dom.InputProperty = {
  * @param {Element} target Target element.
  * @todo observable value {string} the value of the Input
  * @todo observable checked {boolean} the checked state of the Input
- * @todo stability experimental
  * @todo api
  */
 ol.dom.Input = function(target) {
@@ -60,7 +59,7 @@ goog.inherits(ol.dom.Input, ol.Object);
 /**
  * If the input is a checkbox, return whether or not the checbox is checked.
  * @return {boolean|undefined} checked.
- * @todo stability experimental
+ * @todo api
  */
 ol.dom.Input.prototype.getChecked = function() {
   return /** @type {boolean} */ (this.get(ol.dom.InputProperty.CHECKED));
@@ -74,7 +73,7 @@ goog.exportProperty(
 /**
  * Get the value of the input.
  * @return {string|undefined} input value.
- * @todo stability experimental
+ * @todo api
  */
 ol.dom.Input.prototype.getValue = function() {
   return /** @type {string} */ (this.get(ol.dom.InputProperty.VALUE));
@@ -88,7 +87,7 @@ goog.exportProperty(
 /**
  * Sets the value of the input.
  * @param {string} value Value.
- * @todo stability experimental
+ * @todo api
  */
 ol.dom.Input.prototype.setValue = function(value) {
   this.set(ol.dom.InputProperty.VALUE, value);
@@ -102,7 +101,7 @@ goog.exportProperty(
 /**
  * Set whether or not a checkbox is checked.
  * @param {boolean} checked Checked.
- * @todo stability experimental
+ * @todo api
  */
 ol.dom.Input.prototype.setChecked = function(checked) {
   this.set(ol.dom.InputProperty.CHECKED, checked);