Wrap match-cases in parens

[igl]

This fixes #584 and makes match a quite powerful pattern-matching tool.
Test included.

Compiles:

match 1, 3, 3
| 1, 1, 2 or 3 => ok 0
| 1, 2 or 3, 3 => ok 1
| _            => ok 0

To:

// Generated by LiveScript 1.4.0
(function(){
  var ref$;
  switch (ref$ = [1, 3, 3], false) {
  case !(1 === ref$[0] && 1 === ref$[1] && (2 === ref$[2] || 3 === ref$[2])):
    ok(0);
    break;
  case !(1 === ref$[0] && (2 === ref$[1] || 3 === ref$[1]) && 3 === ref$[2]):
    ok(1);
    break;
  default:
    ok(0);
  }
}).call(this);

[vendethiel]

Thanks.

[igl]

😗

[vendethiel]

I wanted to find another fix (changing LEVEL_PAREN below), but since I didn't figure out the problem offhand... Thanks! :)