Add syntax files from upstream vim repository

syntax/htmlcheetah.vim

@@ -0,0 +1,28 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vim') == -1
+  
+" Vim syntax file
+" Language:	HTML with Cheetah tags
+" Maintainer:	Max Ischenko <mfi@ukr.net>
+" Last Change: 2003-05-11
+
+" quit when a syntax file was already loaded
+if exists("b:current_syntax")
+  finish
+endif
+
+if !exists("main_syntax")
+  let main_syntax = 'html'
+endif
+
+runtime! syntax/cheetah.vim
+runtime! syntax/html.vim
+unlet b:current_syntax
+
+syntax cluster htmlPreproc add=cheetahPlaceHolder
+syntax cluster htmlString add=cheetahPlaceHolder
+
+let b:current_syntax = "htmlcheetah"
+
+
+
+endif