BioPerl variation-related functionality

 The code in this distribution focuses on simple low-dependency variant-related
 functionality for BioPerl.
 .
 Bio::Variation name space contains modules to store sequence variation
 information as differences between the reference sequence and changes
 sequences. Also included are classes to write out and recrete objects
 from EMBL-like flat files and XML. Lastly, there are simple classes to
 calculate values for sequence change objects.