BSA — proposed DsLSRBioObjects changes (05)

Consider changing AlignmentElement's element from an Object to a
BioSequence. At the moment element is required to have a name and
provide character-based data, but there's no way to ensure that
behavior. I really dislike implementations that have to hard code
checks on the type of a data member. If the upcoming BSA follow-on
RFPs add new bio-objects, we'll end up checking for BioSequence,
HMM, profile, etc., and then have to treat each one individually.
The real way to solve this problem is to have a BioObject, but that
clearly outside the scope of the current FTF.

Rejected as out of scope for the FTF. Withdrawn by proposer.