necessary modules are now "all.rkt"s; "shard.rkt"s turn to
"resources.rkt".
Also, "navbar.rkt" changes to "all.rkt", since it was doing the same
thing (in addition to setting the navbar).
Fix a reference to meta/web to be symbolic -- otherwise things can get
confused when symlinks are used, ending up with two instances of a
single modeule (once for the symbolic reference and one for a relative
one). It's still best to avoid symlinks, though.
Simplify version specs in the techreports code, re-enable continue
reference, some reformatting.
