The following changes:

write http://www.rebol.com [ HEAD / ]

now returns the last modified date correctly

Added a 'headers keyword in the write dialect to return the headers

page: write http://curecode.org/rebol3/view-tickets.rsp [ headers GET / ]

page/spec/debug/headers will now contain the headers for the page returned
and page/data will contain the web page data

Signed-off-by: Graham Chiu <compkarori@gmail.com>