Add Blob#vendored?

lib/linguist/vendor.yml

@@ -0,0 +1,27 @@
+- yui
+- tiny_mce
+- ckeditor
+- redbox
+- active_scaffold
+- rico_corner
+- code_highlighter
+- vendor
+- bundle
+- node_modules
+- cache
+- assets
+- bookends
+- dojo
+- extjs
+- sencha
+- mochikit
+- prototype(.*)\.js
+- mootools\.js
+- jquery([^.]*)(\.min)?\.js
+- jquery\-\d\.\d\.\d(\.min)?\.js
+- effects\.js
+- controls\.js
+- dragdrop\.js
+- fabfile\.py
+- less([^.]*)(\.min)?\.js
+- less\-\d+\.\d+\.\d+(\.min)?\.js