CANTO use of web services

The pombe implementation of the tool doesn't use any web services as it gets it's data from Chado and from it's own SQLite database.

The UniProt test version uses:

- http://www.uniprot.org/batch/
  to look up genes by ID, to check that the IDs the user enters are
  valid and to get the symbol(s) and gene product

- http://www.ebi.ac.uk/QuickGO/GAnnotation?format=gaf&ref=
  to look up existing GO annotation, for display to the annotator

- http://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=pubmed&retmode=xml&id=
  to look up publications by pubmed ID and return the title, abstract
  and authors - used to check that the user has entered a valid
  pubmed ID