Integrated spell checking

- inline spell highlighter. This requires WebKit 2.3 to work.

- Addition of a suggested replacement word list to the context menu,
for the word right clicked on

- A standard modeless spell check dialog that works on the current
editable text (or selection).
Heavily cribbed from Dawit's work on kdewebkitpart.



REVIEW: 106417
REVIEWED-BY: adjam