Adding support for oddly placed comments

[amadeus]

I have added support for a few basic comment positions. So far this is not really meant to be an exhaustive list of all possibilities, but really the most common patterns, and we can continue to add other comment patterns as people raise issues for them.

Here is a small snippet showing the ones that have been fixed.

class Durp /**/ {
}

class Durp // durp
{
}

class Durp extends Tube // durp
{
}

function testFunc() /**/ {
}

function testFunc() // durp
{
}

if (true) // asdlkfjas d
{
  var durp = 2;
} else /* durp */
{
  var durp = 4;
}

while (true)  // durp
{
  var durp = 2
}

for () /* durp */
{
  var durp = 2;
}

[amadeus]

This should fix #487