Caml-Shcaml 0.2.0

Drop the dependency on camlp4, mainly by replacing the static typing of structured fields by a lighter, dynamically-checked discipline. This trades static guarantees for maintenability.
Build system changes, switch to ocamlbuild+topkg
Some API refactoring; improve API browsing at the price of some signature duplication in the source.
Documentation improvements

Caml-Shcaml 0.1.2

[23 Sep 2008] We no longer distinguish input and output dups. This change is because the old way we did it no longer types under 3.10.2. There is probably a better way.
[19 Sep 2008] Added DepDAG module for running dependency DAGs in parallel.
[19 Sep 2008] Added Fitting.run_list as a convenient fitting runner.

[05 Feb 2008] Sed script used to build documentation is now portable; no longer relies on GNU sed.
[05 Feb 2008] Now supports (and in fact requires) OCaml 3.10. (Should we somehow make it work in both? Seems like a pain.)
[07 Aug 2007, 05 Feb 2008] pa_linetype now supports anonymous row variables, such as <| .. >. When the entire row is anonymous, it expands to < .. > rather than a list of fields.
[15 Aug 2007] Several places that used to use ints for process statuses now use Proc.status instead.