Update Prism.js and add C syntax

assets/javascripts/vendor/prism.js

@@ -494,6 +494,26 @@ Prism.languages.insertBefore('coffeescript', 'keyword', {
 	'attr-name': /[_?a-z-|A-Z-]+(\s*:)| @[_?$?a-z-|A-Z-]+(\s*)| /g
 });
 ;
+Prism.languages.c = Prism.languages.extend('clike', {
+	'keyword': /\b(asm|typeof|inline|auto|break|case|char|const|continue|default|do|double|else|enum|extern|float|for|goto|if|int|long|register|return|short|signed|sizeof|static|struct|switch|typedef|union|unsigned|void|volatile|while)\b/g,
+	'operator': /[-+]{1,2}|!=?|<{1,2}=?|>{1,2}=?|\->|={1,2}|\^|~|%|(&){1,2}|\|?\||\?|\*|\//g
+});
+
+Prism.languages.insertBefore('c', 'keyword', {
+    //property class reused for macro statements
+    'property': {
+        pattern:/#[a-zA-Z]+\ .*/g,
+        inside: {
+            property: /<[a-zA-Z.]+>/g
+        }
+    }
+});
+;
+Prism.languages.cpp = Prism.languages.extend('c', {
+	'keyword': /\b(alignas|alignof|asm|auto|bool|break|case|catch|char|char16_t|char32_t|class|compl|const|constexpr|const_cast|continue|decltype|default|delete|delete\[\]|do|double|dynamic_cast|else|enum|explicit|export|extern|float|for|friend|goto|if|inline|int|long|mutable|namespace|new|new\[\]|noexcept|nullptr|operator|private|protected|public|register|reinterpret_cast|return|short|signed|sizeof|static|static_assert|static_cast|struct|switch|template|this|thread_local|throw|try|typedef|typeid|typename|union|unsigned|using|virtual|void|volatile|wchar_t|while)\b/g,
+	'operator': /[-+]{1,2}|!=?|<{1,2}=?|>{1,2}=?|\->|:{1,2}|={1,2}|\^|~|%|(&){1,2}|\|?\||\?|\*|\/|\b(and|and_eq|bitand|bitor|not|not_eq|or|or_eq|xor|xor_eq)\b/g
+});
+;
 Prism.languages.python= {
 	'comment': {
 		pattern: /(^|[^\\])#.*?(\r?\n|$)/g,