NullPointerException in WriterReportImpl // fixes issue 295
dirty fix for EPUB 3 non-core media type stylesheet fallback checking // refs issue 271
Update and rename README.txt to README.md
Update README.md to point to the release page
Add a license statement.
Update README.md
Add a git ignore file
line endings
Merge remote-tracking branch 'origin/master' into contrib/nook

Conflicts:
	.gitignore
	README.md
	README.txt
	src/main/java/com/adobe/epubcheck/opf/OPFHandler.java
	src/main/java/com/adobe/epubcheck/util/WriterReportImpl.java
	src/test/java/com/adobe/epubcheck/api/Epub30CheckTest.java
	src/test/resources/20/expanded/valid/fallbacks.txt
	src/test/resources/20/expanded/valid/fallbacks/EPUB/lorem.xhtml
fixup tests after merging the main branch into this