Add PureScript language & samples
Added Zephir language
Added ShellSession language using pygments Bash Session lexer
sorted the languages.yml file alphabetically
Merge pull request #1071 from jkutner/add_session_lang

Added ShellSession language
Merge branch 'master' into 1068

Conflicts:
	lib/linguist/samples.json
Merge pull request #1092 from github/1068-update

1068 update
Merge pull request #1008 from garyb/master

PureScript programming language
Samples update
Add F# sample.  Add Forth extension .fs.
Update samples.json.