Merge pull request #366 from bocoup/String.prototype.repeat

...type/repeat/count-coerced-to-zero-returns-empty-string.js

...t-ins/String/prototype/repeat/count-is-infinity-throws.js

...ng/prototype/repeat/count-is-zero-returns-empty-string.js

...ns/String/prototype/repeat/count-less-than-zero-throws.js

...ins/String/prototype/repeat/empty-string-returns-empty.js

test/built-ins/String/prototype/repeat/length.js

test/built-ins/String/prototype/repeat/name.js

...uilt-ins/String/prototype/repeat/repeat-string-n-times.js

test/built-ins/String/prototype/repeat/repeat.js

...ng/prototype/repeat/return-abrupt-from-count-as-symbol.js

...t-ins/String/prototype/repeat/return-abrupt-from-count.js

...ing/prototype/repeat/return-abrupt-from-this-as-symbol.js

...lt-ins/String/prototype/repeat/return-abrupt-from-this.js

.../built-ins/String/prototype/repeat/this-is-null-throws.js

...t-ins/String/prototype/repeat/this-is-undefined-throws.js