Boldigger2

Adjusted the download limit to 50 again.

fixed a bug where all records hit where ignored when ordering and selecting the top hits.

Adjusted BOLDigger2 to the new download limit of 10 enforced by the BOLD website

More minor bugfixes to increase stability

- another bugfix, sometimes the new download function creates duplicates which are now removed when ordering the hits

**Major update**

- For large datasets, the download links expired in the previous version leading to an error
- Rewrote the identification engine and changed the algorithm
- Now BOLDigger directly downloads the data instead of storing the download links first, which should lead to more stable and ~ twice as fast download speed
- Due to the large rewrite this will break backward compatibility, increases overall stability