* Importer fix: we were trimming the wrong part of the classname when creating a category. This led to categories not being recognized.
* Add a component importer. Uses same fields as consumable importer. Only trick: If an asset_tag is present, we checkout a component to that asset on import
Enable component importer. Also calculate the importer classname in a cleaner fashion.
* Fix comparisons. find can return an index of 0, which is falsy.
