[Enhancement] Extend default Range-Object for IE 8

[SunboX]

IE 8 doenst support Range-methods like "selectNode()". So extend the Range-Object. TinyMCE does this in a good way. I think it can easily be adapted.

[cheeaun]

There's MooEditable.Selection.selectNode

[SunboX]

Hm, ah ok. Works fine in Firefox but does not in IE. I´ve not much time now, will take a look later. thx