Add basic syntax files

- Set the filetype to "vue" for files with a .vue extension
 - Define regions for <template>, <style>, and <script> tags
 - Include HTML, CSS, and JavaScript syntax highlighting for the <template>,
   <style>, and <script> regions

README.md

@@ -0,0 +1,2 @@
+Vim syntax highlighting for [Vue
+components](http://vuejs.org/guide/application.html#Single_File_Components).