create site output in initialize
remove unnecessary puts
only replace strings that look like links with link handlers.

i.e. protocol://link_path_goes_here
path is accessible from repository

Breaks the illusion but allows handlers to be simple and manipulate the file system
do not cache site.

It should be new if the posts have changed
copy images to output dir for previewing

Based on the S3Uploader.
This is vital for previewing the format/layout of posts and modification before publication.
List ImageRelocator as a handler in Previewer