Add Chapel parallel programming language.

Includes several example programs from source distribution.
Include Chapel in some of the language tests.
Merge remote-tracking branch 'github/master' into chapel-lang

Conflicts:
	lib/linguist/samples.json
added two more common file endings for perl programs
fixed extension order
fixed extension order, hopefully correctly this time
fixed extension order, hopefully correctly this time
Merge remote-tracking branch 'github/master' into chapel-lang

Conflicts:
	lib/linguist/samples.json
Update vendor.yml: added animate.css
extension for biblatex
Add LookML
Adding test to check that languages.yml includes all extensions represented in samples folder
Merge branch 'master' of github.com:github/linguist into chapel-lang

Conflicts:
	lib/linguist/samples.json
Merge pull request #1451 from github/extensions

Adding test to check that languages.yml includes all extensions represented in samples folder
Merge pull request #1375 from arthurvr/master

Update vendor.yml: added animate.css
Merge branch 'master' into 1364-local

Conflicts:
	lib/linguist/languages.yml
Adding samples for new extensions
Samples update
Merge branch 'master' into 1348-local

Conflicts:
	lib/linguist/samples.json
Merge pull request #1457 from github/1364-local

1364 local