update readme for iframe support

Author: lucidBrot

.brotkeys.js.swp

@@ -214,7 +214,15 @@ autogenerateWithinId(containerId, generationTarget, /*optional*/ css_class_name,
 `containerId` - String, ID of the container element
 For the other arguments, see in the section on [autogenerate](#autogeneration), which is right above this one.
 
+Sometimes, autogeneration will not traverse certain boundaries. For example, `container.getElementById()` will never find any elements that are within an iframe that is somewhere in the container. If you want to support your iframe (let's say it has id `ifrem`), you can do so by additionally running this after your other generations:  
 
+```javascript
+autogenerateWithinId("ifrem", manager.GenerationEnum.tag_anchor)
+```
+
+This example will add link hints to all `<a/>` tags within that iframe.
+
+Currently, iFrame support is limited to iframes that can be found with `document.getElementById()` - so  no nested iFrames.
 
 ### Multiple HotkeyManagers
 

README.md

@@ -801,7 +801,6 @@ function brotkeys_autogenerate_manager_for_class_tag(css_class_name){
 }
 
 /*
-    TODO: scrolling with j and k
     TODO: add option to explicitly ignore specific elements for autogeneration
     TODO: add option to explicitly ignore elements for autogeneration that already have a brotkeysid from that manager
     TODO: add space before link hint