Fix issue with 'this' binding in PdfStreamConverter
Use relative paths for ref images and copy refs.
Merge pull request #2940 from brendandahl/ref-fixes

Use relative paths for ref images and copy refs.
Merge pull request #2927 from mduan/fix-this-binding

Fix issue with 'this' binding in PdfStreamConverter
Add back cid cff font test.
Merge pull request #2942 from brendandahl/add-back-cid

Add back cid cff font test.
Ignore test snapshots directory.
Merge pull request #2950 from brendandahl/ignore-snps

Ignore test snapshots directory.
Implement "B5pc-H" CMap