Fixing Util.Range.insert_node to work properly with IE in the case where the start container is a text node.
Fixing Util.Range.insert_node to work properly with IE in the case where the start container is a text node.

The IE bug in question was causing issue 100; this, too, is now fixed.
tectronics/loki-editor,tectronics/loki-editor,tectronics/loki-editor,tectronics/loki-editor