NOTICE.txt: add missing scijava-common deps
NOTICE.txt: add MarkdownJ and Apache Commons Lang

Apache Commons Lang dependency was added to support conversion of text
files to HTML, for proper escaping of HTML entities, since strangely,
Java does not seem to have such a feature out of the box.
See: 85e25ed5d1b2411d15062558e73dd1c07921ddf3.

MarkdownJ dependency was added to support Markdown-formatted text files.
See: 0c3e17f5779920ec1a9dbaba3075c038b32b6ad5a.