This will allow me to recompile faster after making changes, and should
(slightly) speed up overall compilation.
I manually verified that the unseed matched for one test before and
after this change, so I probably didn't screw up the refactor
Remove the use of relative paths. A header at foo/bar.h could be included by
files under foo/ with "bar.h", but would be included everywhere else as
"foo/bar.h". Adjust so that every include references such a header with the
latter form.
Signed-off-by: Robert Escriva <rescriva@dropbox.com>