Many more changes:
- No more hard-coded selenoprotein U positions (hooray!)
- Support for CON record CO lines
- No reliance on Genomical_cannonical when deciding which seqs to dump
    (looks for relevant EMBL dumping tags in objects instead)
- Increased phasing out of COMMON_DATA usage (in prep for db migration)
- Get transcript/CDS/Pseudogene->Gene and gene names from database
    (do not try to "guess" the gene name by parsing the transcript name)
- Remove hackery for multiple-sequence locations (not needed any more)
- More fine-grained classification on miRNAs
- Support for sequence-level dumping (clones: with sequence, without
    annotation; toplevel: without sequence, with annotation)
Location YAML config file now configurable
New script to project non-toplevel features to toplevel in an Acedb database