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
Add more extensions based on XML
Add samples as requested.
.frag file extension added for JavaScript with some new samples
Add targets sample.
Merge pull request #1155 from NN---/patch-1

Add more extensions based on XML
Updating samples
Added modernizr.js to vendor files list, added tests
Merge pull request #1183 from alflanagan/master

Added modernizr.js to vendor files list, added tests
bump charlock_holmes to 0.7.0
use charlock 0.7.1 or better