docs(select): add onClose and onOpen

Author: Kamil Kisiela

docs/types/select.md

@@ -1,41 +1,68 @@
-# select
-## md-select
+select
+======
+
+md-select
+---------
 
 ### Example
 
 ```javascript
 {
-  "type": "select",
-  "key": "name",
-  "templateOptions": {
-    "label": "Name",
-    "theme": "custom",
-    "multiple": true,
-    "labelProp": "firstName",
-    "valueProp": "id",
-    "options": [
-        {"firstName": "Sarah", id: 1},
-        {"firstName": "Jessica", id: 2},
-        {"firstName": "Parker", id: 3}
-    ]
+  type: "select",
+  key: "name",
+  templateOptions: {
+    label: "Name",
+    theme: "custom",
+    multiple: true,
+    labelProp: "firstName",
+    valueProp: "id",
+    options: [
+        {firstName: "Sarah", id: 1},
+        {firstName: "Jessica", id: 2},
+        {firstName: "Parker", id: 3}
+    ],
+    onOpen: () => {
+      console.log('select is opened');
+    },
+    onClose: () => {
+      console.log('select is closed');
+    }
   }
 }
 ```
 
 ### Configuration
 
-#### templateOptions.label _: string_
+#### templateOptions.label *: string*
+
+#### templateOptions.theme *: string*
 
-#### templateOptions.theme _: string_
+#### templateOptions.options *: array*
 
-#### templateOptions.options _: array_
 Array with available options
 
-#### templateOptions.labelProp _: string (default: name)_
+#### templateOptions.labelProp *: string (default: name)*
+
 Name of property with option's label
 
-#### templateOptions.valueProp _: string_
+#### templateOptions.valueProp *: string*
+
 Name of property with option's value
 
-#### templateOptions.multiple _: boolean_
+#### templateOptions.multiple *: boolean*
+
 Multiple choice
+
+#### templateOptions.onOpen *: function*
+
+Bound to md-on-open.
+
+Expression to be evaluated when the select is opened.
+
+If expression returns a promise, it will display a loading indicator while it is being resolved.
+
+#### templateOptions.onClose *: function*
+
+Bound to md-on-close.
+
+Expression to be evaluated when the select is closed.