genbank_evidence() slight changes to suppress bug. Rationale not clear.
_validate_assembly_gaps() added parameter for gap size to report and explicit evaluation of evidence.
Added START_CODON gloabl var.
Added STOP_CODON precompiled regez.
Created first_codon and last_codon methods.
Created _make_genbank_gene_terminii().
Created _make_genbank_gene_terminii().
Result checking for _adjust().
Fixed STOP_CODON
Debugging changes. Not permanent.