Add YARA language (#3877)

* Add YARA language grammars

* Add YARA to languages.yml

* Add YARA samples

* Add YARA to README

vendor/README.md

@@ -406,4 +406,5 @@ This is a list of grammars that Linguist selects to provide syntax highlighting
 - **Yacc:** [textmate/bison.tmbundle](https://github.com/textmate/bison.tmbundle)
 - **YAML:** [atom/language-yaml](https://github.com/atom/language-yaml)
 - **YANG:** [DzonyKalafut/language-yang](https://github.com/DzonyKalafut/language-yang)
+- **YARA:** [blacktop/language-yara](https://github.com/blacktop/language-yara)
 - **Zephir:** [phalcon/zephir-sublime](https://github.com/phalcon/zephir-sublime)

vendor/licenses/grammar/language-yara.txt

@@ -0,0 +1,26 @@
+---
+type: grammar
+name: language-yara
+license: mit
+---
+The MIT License (MIT)
+
+Copyright (c) 2014-2016 Blacktop
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.