Merge pull request #184 from bocoup/iteration-semantics-2

test/language/for-of/break-from-catch.js

test/language/for-of/break-from-try.js

test/language/for-of/break-label.js

test/language/for-of/break.js

test/language/for-of/continue-from-catch.js

test/language/for-of/continue-from-try.js

test/language/for-of/continue-label.js

test/language/for-of/continue.js

test/language/for-of/generator.js

test/language/for-of/generic-iterable.js

test/language/for-of/head-expr-obj-iterator-method.js

test/language/for-of/head-expr-primitive-iterator-method.js

test/language/for-of/head-expr-to-obj.js

test/language/for-of/iterator-as-proxy.js

test/language/for-of/iterator-next-reference.js

test/language/for-of/iterator-next-result-done-attr.js

test/language/for-of/iterator-next-result-type.js

test/language/for-of/iterator-next-result-value-attr.js

test/language/for-of/nested.js

test/language/for-of/return.js