[~BUGFIX] Implemented the indexer somewhat different, works with all sources instead of only array
Merge branch 'refs/heads/master' into alternative-sku-list

* refs/heads/master:
  [~BUGFIX] Added method to fix #69
Merge pull request #90 from avstudnitz/alternative-sku-list

[~BUGFIX] Implemented the indexer somewhat different, works with all sources instead of only array