EMBL indexing bug reported by @eparker05
SeqIO._index: fixed key selection for 'embl' in cases where it didn't match SeqIO.parse
Contributors since Biopython 1.64 release.

This includes two new contributors, Evan Parker (@eparker05, SeqIO
indexing bug and fix found during his GSoC word) and Mike Cariaso
(@cariaso, ABI sample data and input into enhancement to expose
the raw data to the user).
Longer line wrapping (78 chars); also thank David (ABI work)
SeqIO.SffIO raise RuntimeError instead of RunTimeError to prevent NameError
Better Medline Parser
Thank Alan Du for Medline parser work (PR #355)