dbfetch tutorial

This workflow eases entry in the world of Taverna with one of the key tasks - the retrieval of plain data. The dbfetch offers sequence and structure data from a large variety of sources. A first execution of this workflow informs about these in the "getSupportedDBs" output. Also the formats and styles are listed. The two inputs allow for the specification of a query that leaves the format with "default" (which is different for every database, "native" would be a better fit), the style is always "raw". With the output being presented as a list of strings, which is very slow for larger entries, the list of lines are merged into single strings for each entry prior to the display.