adding shallow version for convenience

shallow.js

@@ -0,0 +1,9 @@
+var lib = require('./lib/deap');
+
+var deap = module.exports = lib.extendShallow;
+
+deap(deap, {
+	clone: lib.clone,
+	extend: lib.extendShallow,
+	merge: lib.mergeShallow
+});

test/shallow.test.js

@@ -0,0 +1,22 @@
+var assert = require('chai').assert,
+	lib = require('../lib/deap'),
+	shallow = require('../shallow');
+
+describe('shallow', function() {
+
+	it('should be defined correctly', function() {
+		assert.isFunction(shallow);
+
+		assert.isFunction(shallow.extend);
+		assert.isFunction(shallow.merge);
+		assert.isFunction(shallow.clone);
+	});
+
+	it('should be shallow functions', function() {
+		assert.equal(shallow, lib.extendShallow);
+		assert.equal(shallow.extend, lib.extendShallow);
+		assert.equal(shallow.merge, lib.mergeShallow);
+		assert.equal(shallow.clone, lib.clone);
+	});
+
+});