Skip if seq region is not defined

Skip if seq region is not defined

Merge branch 'postreleasefix/104' into release/104

Merge pull request Ensembl#990 from dglemos/outputfactory_numberify_104

OutputFactory json - do not convert gene symbol to integer (104)

subversion update (Ensembl#987)

Merge branch 'postreleasefix/104' into release/104

increment subversion (Ensembl#933)

Update VEP JSON output for var_synonyms (Ensembl#915)

Update VEP JSON output for var_synonyms (Ensembl#915)

custom gff: skip protein_coding transcripts with no exons -e102 (Ense…

…mbl#870)

* skip protein_coding transcripts with no exons

* add test

* simplify test