Updated runtime files.

runtime/syntax/rrst.vim

@@ -1,16 +1,14 @@
 " reStructured Text with R statements
 " Language: reST with R code chunks
 " Maintainer: Alex Zvoleff, azvoleff@mail.sdsu.edu
-" Last Change: Wed Jul 09, 2014  10:29PM
+" Homepage: https://github.com/jalvesaq/R-Vim-runtime
+" Last Change: Sat Feb 06, 2016  06:45AM
 "
 " CONFIGURATION:
 "   To highlight chunk headers as R code, put in your vimrc:
 "   let rrst_syn_hl_chunk = 1
 
-" for portability
-if version < 600
-  syntax clear
-elseif exists("b:current_syntax")
+if exists("b:current_syntax")
   finish
 endif