docs: Use XeLaTeX for PDF documentation
doc: Use a 10pt font
merge dev_4_4 -D org -I include -E exclude: PR 389 (docs: Use XeLaTeX for PDF documentation)
merge dev_4_4 -D org -I include -E exclude: PR 617 (Override getValue() in OriginalMetadataAnnotation)
merge dev_4_4 -D org -I include -E exclude: PR 622 (Upgrade SLF4J to 1.7.2 [dev_4_4])