Benvie/continuum — pull request #27 by richdougherty (2014-03-23 11:54:00+00:00)
Title: Don't break in unlabeled blocks; balance switch scope

Fixes a couple of bugs that prevented the test262 test harness from running.
- An unlabeled break was able to break to an unlabeled block. This messed up breaks in most loops, since most loops have a block statement.
- The switch statement included a call to pushScope that wasn't matched by a call to popScope.

Example code that is fixed:
````javascript
while (true) {
break;
}
````

````javascript
{
let x = 'a';
{
let x = 'b';
switch (1) {
case 1:
console.debug('1');
break;
case 2:
console.debug('2');
}
console.debug('x in b: ' + x);
}
console.debug('x in a: ' + x);
}
````