Add the sample files for github-pages
Add another diagram and diagram titles
Merge branch 'master' into gh-pages

Conflicts:
	.gitignore
	Gemfile
	Gemfile.lock
	Rakefile
	sample.adoc
	sample.html
Resolve merge conflict in .gitignore
Use release version of asciidoctor-diagram-cacoo instead of one at github
Ignore README for creating pdf and html
Update sample files to download contents.xml for cacoo diagrams
Update sample.pdf
Update Rakefile to use Japanese VLGothic font
Add Japanese sample asciidoc and pdf files
Add mention to `direnv allow .`