Output full-length coding sequence + UTR when $gene_length == -1
Gitignore zip'd files
Get options from CLI
Partially implement 5' vs 3'
Die if both 5' and 3' are specified
Make check_options sub
Make combine_seqs sub
Make trim_seq sub
Fix combine_seqs
Get samtools_path from CLI (has default) & verify samtools exists
Add 5' functionality to find_utr_boundaries
Add 5' functionality to trim_seq
Refactor trim_seq
5'UTR functionality complete
Bypass CDS extraction, etc. for UTR only (i.e.,  = 0)
Merge branch 'feature/get-options' into develop