Merge pull request #387 from bocoup/default-parameters

test/language/default-parameters/call-define-values.js

...nguage/default-parameters/call-returns-reference-error.js

test/language/default-parameters/class-definitions.js

...s/default-parameters-always-provide-unmapped-arguments.js

test/language/default-parameters/destructuring.js

test/language/default-parameters/function-constructor.js

test/language/default-parameters/function-length.js

test/language/default-parameters/generators.js

test/language/default-parameters/method-definitions.js

test/language/default-parameters/param-ref-initialized.js

test/language/default-parameters/param-ref-uninitialized.js

test/language/default-parameters/replace-default-values.js

test/language/default-parameters/rest-parameters.js

.../default-parameters/returns-abrupt-from-property-value.js

test/language/default-parameters/scope.js

...ters/syntaxerror-on-duplicates-on-function-declaration.js

...eters/syntaxerror-on-duplicates-on-function-expression.js

...default-parameters/variable-initial-value-as-parameter.js

...ge/default-parameters/variable-initial-value-undefined.js