Added missing jsdocs

* Env#execute
* Env#allowRespy
* Enough of Spec to support spec filters

src/core/Spec.js

@@ -1,9 +1,19 @@
 getJasmineRequireObj().Spec = function(j$) {
+  /**
+   * @interface Spec
+   * @see Configuration#specFilter
+   */
   function Spec(attrs) {
     this.expectationFactory = attrs.expectationFactory;
     this.asyncExpectationFactory = attrs.asyncExpectationFactory;
     this.resultCallback = attrs.resultCallback || function() {};
     this.id = attrs.id;
+    /**
+     * The description passed to the {@link it} that created this spec.
+     * @name Spec#description
+     * @readonly
+     * @type {string}
+     */
     this.description = attrs.description || '';
     this.queueableFn = attrs.queueableFn;
     this.beforeAndAfterFns =
@@ -195,6 +205,12 @@ getJasmineRequireObj().Spec = function(j$) {
     return 'passed';
   };
 
+  /**
+   * The full description including all ancestors of this spec.
+   * @name Spec#getFullName
+   * @function
+   * @returns {string}
+   */
   Spec.prototype.getFullName = function() {
     return this.getSpecName(this);
   };