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
Support for Cycript language with .cy file extension
Add knockout.js library as vendor file
Lexer for Handlebars
Remove file extensions with multiple segments
Merge pull request #1437 from pchaigno/handlebars-lexer

Lexer for Handlebars
Merge pull request #1438 from pchaigno/file-extensions

Remove file extensions with multiple segments
Merge pull request #1433 from pchaigno/knockout.js

Add knockout.js library as vendor file
Merge pull request #1432 from pchaigno/cycript

Support for Cycript language
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