Update topics/about_scope.js

The answer was given,was that on purpose?
Merge pull request #25 from magopian/patch-3

Update topics/about_scope.js
fixed a problem in the hasOwnProperty test
Update README.md
added license
Update license.txt
Explicitly declare for..in vars
Merge pull request #27 from shosti/for-in

Explicitly declare for..in vars
shift and unshift, array methods
 shift and unshift, array methods
Merge pull request #28 from KevinWhalen/patch-1

shift and unshift, array methods