funannotate v1.7.3

• bug fix release. This will be the last release before updating the code for py3
• bug fix for remote #379
• improve GFF3 parsing in funannotate annotate allow for non-funannotate identifiers (hopefully this catches most of them)
• --aligners option was missing from help menu in train/update
• add --debug flag to funannotate iprscan -- there is potentially still an issue here combining results from the newest release of Interproscan -- I need some intermediate results to see what the problem is
• fix GO annotations parsing for more versions of goatools #363
• fix for bug in the "gene start or end in a gap" function
• make sure funannotate annotate re-runs tbl file generation if script is re-run
• fix in PASA function logic where PASA db not found if using --gff and --fasta input.