Remove dead notes content
Rewrap long command line

Closes #165
Fix broken xref
Merge pull request #166 from progit/scrub-xrefs

Fix broken xref
Merge pull request #163 from progit/remove-notes

Remove dead notes content
Merge remote-tracking branch 'upstream/master'

Conflicts:
	book/02-git-basics/sections/recording-changes.asc