Add bootstrap script.

This script takes care of all the dependencies.

ocaml/bootstrap

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+case `uname -s` in
+  'Darwin')
+    PKG_CONFIG_PATH=/usr/local//Cellar/sqlite/3.8.0.2/lib/pkgconfig
+    brew install gnutls
+    ;;
+  'FreeBSD')
+    sudo portsnap fetch update
+    cd /usr/ports/security/gnutls
+    sudo make install
+    ;;
+  *)
+    echo "Unsupported platform."
+    exit 1
+    ;;
+esac
+
+opam update
+opam install lwt
+opam install conf-gnutls
+opam install ocamlnet
+opam install irc-client