Merge pull request #18 from TravisBernard/master

Merge patch for issue #18 - in some cases, items that only fit in a single orientation were being recorded as fitting in the alternate, impossible one.

Packer.php

@@ -270,7 +270,7 @@ public function packIntoBox(Box $aBox, ItemList $aItems) {
           $remainingWeight -= $itemToPack->getWeight();
 
           if ($fitsRotatedGap < 0 ||
-              $fitsSameGap <= $fitsRotatedGap ||
+              ($fitsSameGap >= 0 && $fitsSameGap <= $fitsRotatedGap) ||
               (!$aItems->isEmpty() && $aItems->top() == $itemToPack && $remainingLength >= 2 * $itemLength)) {
             $this->logger->log(LogLevel::DEBUG,  "fits (better) unrotated");
             $remainingLength -= $itemLength;