patch: Re: [Dillo-dev] start on image maps (dw-part)

dw: I added motionNotifyImpl() and currLink dillo: - I imagine the setUseMap() in open_img() is probably supposed to be routed through DilloImage. - Html_read_coords() was borrowed from 0.8.6 and modified a fair amount. For one thing, the old code couldn't handle whitespace preceding a comma. - I didn't really like that dReturn_if_fail so far down in open_area() since coords is dynamically allocated now, but I left it there.