Update of editing/selection code in khtml

[Vyacheslav Tokarev]

Hello,

I'd like to write a short note about what I've been doing lately.
I've taken latest classes from WebCore that are responsible for editing,
selecting etc and start to port / update old classes that we already have.
Here is the short list of important ones:
DOM::Selection
DOM::SelectionController
DOM::Position
DOM::PositionIterator
DOM::VisiblePosition

I'm attaching the current diff between my master and work kdelibs branches.
A lot of stuff is still missing, and needs some work, but I hope to have it
more or less stable for 4.3 soft freeze.
However, caret positioning and movement, selection already somewhat works.

Please feel free to comment.

Best regards,
Vyacheslav Tokarev (vtokarev)
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