add closures.js

Signed-off-by: arcticlion <david.malan@aol.com>
add thisObject.js

Signed-off-by: arcticlion <david.malan@aol.com>
add mimcking block scope

Signed-off-by: arcticlion <david.malan@aol.com>
add provate\ varibables.js

Signed-off-by: arcticlion <david.malan@aol.com>
add recursion.js

Signed-off-by: arcticlion <david.malan@aol.com>