This pull request solves issue #674, see it for details.
Basic SAS

Just an entry for SAS with the basic .sas file extension and two
examples.
Add misser lexer entry for nesC to languages.yml

The nesC entry in the languages.yml file was missing a lexer entry
and thus wasn't getting picked up. This adds the required lexer line.
bundle fix

Lets see if this fixes the failing tests
Adding QMake (Make-like) language.

Mostly because the file extension conflicts with that of Prolog.
Add misclassified Prolog samples

These two files are incorrectly classified as Perl.  They should be
classified as Prolog.  There are many distinctive tokens in each file
which clearly differentiate between Perl and Prolog.
included sample and extension .ML extension for Standard ML files
Add R package ignores to vendor.yml

Ignore vignette and external data directories which contain no R source code
Merge branch 'master' into 815

Conflicts:
	lib/linguist/samples.json
Idris is upstream in Pygments now: https://bitbucket.org/birkenfeld/pygments-main/pull-request/210
.frag file extension added for JavaScript with some new samples
Groovy: Add .gvy, .grt, and .gtpl to the list of extensions
Add html5shiv to vendor.yml
Extend vendor test for html5shiv
Handle minified html5shiv
Groovy: Sorted Extensions
Created a Sample for .gtpl
Created Sample for .grt
Created Sample for .gvy
update