docs(tabs): remove deprecated direction & add missing deselect

Author: bekos

src/tabs/docs/readme.md

@@ -16,10 +16,6 @@ AngularJS version of the tabs directive.
  	_(Defaults: 'tabs')_ :
  	Navigation type. Possible values are 'tabs' and 'pills'.
 
- * `direction`
- 	_(Defaults: null)_ :
- 	What direction the tabs should be rendered. Available: 'right', 'left', 'below'.
-
 #### `<tab>` ####
 
  * `heading` or `<tab-heading>`
@@ -36,4 +32,8 @@ AngularJS version of the tabs directive.
 
  * `select()`
  	_(Defaults: null)_ :
- 	An optional expression called when tab is activated.
+ 	An optional expression called when tab is activated.
+    
+ * `deselect()`
+ 	_(Defaults: null)_ :
+ 	An optional expression called when tab is deactivated.