Declare .cs as Smalltalk changeset
C# samples to disambiguate from Smalltalk
Re-generate samples.json
Merge branch 'master' into cs-smalltalk

Conflicts:
	lib/linguist/languages.yml
	lib/linguist/samples.json
Merge pull request #1797 from github/cs-smalltalk

Cs smalltalk
Samples for xml.fr and html.fr.
Fix #1731 to allow samples with multiple file extension segments.