Allow for disabling individual languages, closes #66

syntax/rhelp.vim

@@ -1,3 +1,5 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'r-lang') == -1
+  
 " Vim syntax file
 " Language:    R Help File
 " Maintainer:  Johannes Ranke <jranke@uni-bremen.de>
@@ -153,3 +155,5 @@ endif
 
 let   b:current_syntax = "rhelp"
 " vim: foldmethod=marker:
+
+endif