Gnuplot added
.gnuplot added for Gnuplot language
Example file autogenerated by Mathematica.
Added a simple Mathematica package as a test case.
Added languages and regenerated samples.json.
Added text-only lexer, since Pygments doesn't support Mathematica.
Added another Mathematica sample, improving accuracy.
add interpreter for javascript
Add React library to vendor.yml

React is a library quickly growing in popularity.  Let's exclude it from language stats.
Support of SystemVerilog
CSS color added to SystemVerilog
Support of AspectJ language
Comment.m : routine with comments but no commands

The routine Comment.m has most of the rules for comments and tags.
Support of the .vh file extension for SystemVerilog
dramatically enhance colors for javascript and css
update improved javascript color in test_language
Fixing cache vendor regex

* Fixes #1051
* Any folder with "cache" in it was being ignored. This fixes it.
Merge branch 'master' into 979
Merge pull request #1080 from github/979-update

Update of https://github.com/github/linguist/pull/979
Merge pull request #969 from pchaigno/aspectj

Support of AspectJ language