upgraded ocaml/cryptokit to 1.7
upgraded camlzip to version 1.05 to allow compilation with ocaml-4.00.1
upgraded lablgtk to version 2.16 to allow compilation with ocaml-4.00.1
Upgraded omake to 0.9.8.6_rc1. kept the previous version as default because this is a rc1.

This is necessary to compile the latest camlimages
upgraded ocaml/sqlite3 to 2.0.4
Upgraded ocamlnet to 3.6.3. Also enabled mot functionality of ocamlnet like nethttp
New ocaml packages:
- ocaml-cairo
- camlimages
- dypgen
- patoline
Add the possibility to build a patoline environment with
nix-env -i env-patoline.

This is the only reasonnable way to install patoline which require
ocaml compiler with a large set of libraries installed.
Forgotten to add wanr.patch for omake.
simplify env-patoline and circumvert the bug with libgcc_s.so.1
Merge pull request #601 from craff/ocaml/upgrade_and_new

Ocaml/upgrade and new