chore(docs): add relative naming docs for 'is', 'includes' and 'get'.

fixes angular-ui#637

src/state.js

@@ -974,13 +974,18 @@ function $StateProvider(   $urlRouterProvider,   $urlMatcherFactory) {
      *
      * @example
      * <pre>
+     * $state.$current.name = 'contacts.details.item';
+     *
+     * // absolute name
      * $state.is('contact.details.item'); // returns true
      * $state.is(contactDetailItemStateObject); // returns true
      *
-     * // everything else would return false
+     * // relative name (. and ^), typically from a template
+     * // E.g. from the 'contacts.details' template
+     * <div ng-class="{highlighted: $state.is('.item')}">Item</div>
      * </pre>
      *
-     * @param {string|object} stateName The state name or state object you'd like to check.
+     * @param {string|object} stateName The state name (absolute or relative) or state object you'd like to check.
      * @param {object=} params A param object, e.g. `{sectionId: section.id}`, that you'd like 
      * to test against the current active state.
      * @returns {boolean} Returns true if it is the state.
@@ -1013,11 +1018,17 @@ function $StateProvider(   $urlRouterProvider,   $urlMatcherFactory) {
      * <pre>
      * $state.$current.name = 'contacts.details.item';
      *
+     * // Using partial names
      * $state.includes("contacts"); // returns true
      * $state.includes("contacts.details"); // returns true
      * $state.includes("contacts.details.item"); // returns true
      * $state.includes("contacts.list"); // returns false
      * $state.includes("about"); // returns false
+     *
+     * // Using relative names (. and ^), typically from a template
+     * // E.g. from the 'contacts.details' template
+     * <div ng-class="{highlighted: $state.includes('.item')}">Item</div>
+     *
      * </pre>
      *
      * @description
@@ -1036,7 +1047,8 @@ function $StateProvider(   $urlRouterProvider,   $urlMatcherFactory) {
      * $state.includes("item.**"); // returns false
      * </pre>
      *
-     * @param {string} stateOrName A partial name to be searched for within the current state name.
+     * @param {string} stateOrName A partial name, relative name, or glob pattern
+     * to be searched for within the current state name.
      * @param {object} params A param object, e.g. `{sectionId: section.id}`, 
      * that you'd like to test against the current active state.
      * @returns {boolean} Returns true if it does include the state
@@ -1118,7 +1130,7 @@ function $StateProvider(   $urlRouterProvider,   $urlMatcherFactory) {
      * @description
      * Returns the state configuration object for any specific state or all states.
      *
-     * @param {string|object=} stateOrName If provided, will only get the config for
+     * @param {string|object=} stateOrName (absolute or relative) If provided, will only get the config for
      * the requested state. If not provided, returns an array of ALL state configs.
      * @returns {object|array} State configuration object or array of all objects.
      */