Added README

Raynos · Aug 31, 2011 · e9e104e · e9e104e
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+# contracts
+
+Work in process.
+
+Based on design by contract.
+
+Motivation :
+
+	var f = function(a, b) {
+		return a + b;
+	}
+
+	var f = f.pre(function(a, b) {
+		a.should.be.a("number").and.above(0);
+		b.should.be.a("number").and.above(0);
+	}).post(function(ret, a, b) {
+		ret.should.be.equal(a + b);
+	});