Merge pull request #10 from SergioCrisostomo/opacityfix

specs opacity fix
bypass spec if on compat testing
Merge pull request #11 from SergioCrisostomo/Array-type-specs-fix

Restored original syntax
Merge pull request #12 from SergioCrisostomo/function-bind-compat

function bind spec fix
fix specs to look for correct behaviour since 1.3
Merge pull request #6 from SergioCrisostomo/newElementsLength

New elements length