fix compilation on 32bits implementations
Merge pull request #114 from gasche/master

fixes #113: tryocaml cannot build on a 32bits machine
Fix issue #115
A lesson to help beginners dodge various syntax traps

With exercises that may be a little too frightening...
Should we have this so early? Should we have it at all?
I'm under the impression that ocaml syntax is too complex
to allow a complete beginner to take advantage of the current
tutorial, yet I'm not convinced this is a good idea to draw
attention on this topic.
Merge branch 'master' of github.com:rixed/tryocaml into without_js_of_ocaml
Merge branch 'syntax' of github.com:rixed/tryocaml into without_js_of_ocaml