Add identical identifiers release note
Bump version to 3.6.10
Set release date for 3.6.10
Update Gemfile.lock
Add release notes for 3.6.10.1
Bump version to 3.6.10.1
Merge branch 'release-3.6.x'

Conflicts:
	Gemfile.lock
	NEWS.md
	lib/nanoc/version.rb