Fail build on invalid bib file

support/compile.sh

 #!/usr/bin/env bash
 biber --tool --configfile=src/biber/reformat.xml gipp.bib --validate-datamodel
-diff -w gipp.bib gipp_bibertool.bib || support/commitUp.sh
+diff -w gipp.bib gipp_bibertool.bib || support/commitUp.sh && exit 1
 cd src/tex
 latexmk
 cp allRefs.pdf ../../main.pdf