Construct a skeleton for line joining
Add states to process line joining
Join lines
Make line joining work for asides
Explain the joining function in README.md
Merge branch 'master' into join-lines

Conflicts:
	README.md
Join footnote lines correctly
Add explanation in README.md
Improve explanations on joining lines in README.md
Merge pull request #30 from kazutomi/join-lines

Join lines by line-end backslash