Add _.cloneDeep alias of _.clone(…, true). [closes #140]

Former-commit-id: b71397d5c5b71cb28a60eb4656cbaf12f6b03d1a

test/test-build.js

@@ -147,6 +147,7 @@
   var objectsMethods = [
     'assign',
     'clone',
+    'cloneDeep',
     'defaults',
     'extend',
     'forIn',
@@ -248,6 +249,7 @@
   /** List of methods used by Underscore */
   var underscoreMethods = _.without.apply(_, [allMethods].concat([
     'bindKey',
+    'cloneDeep',
     'forIn',
     'forOwn',
     'isPlainObject',