new constant in Jsonc extension
fix pdflib test, functions only available if PDFLIB_MAJORVERSION >= 8
Merge pull request #101 from remicollet/issue-223

Issues with 2.23.0
fixed releases date and status
add pdf-a4 generation to build phing script
add web generation to build phing script
bugfix release 2.23.1 is ready
Merge branch 'develop'