add Contributing.md to .Rbuildignore which was refreshed as well

Author: eddelbuettel

.Rbuildignore

@@ -6,11 +6,10 @@ inst/doc/jss.bst
 vignettes/jss.bst
 ^.*\.Rproj$
 ^\.Rproj\.user$
-inst/include/Rcpp/preprocessor
-inst/include/Rcpp/sugar/functions/impl
 vignettes/notyet
 doxyfile
 .travis.yml
 .dir-locals.el
 .clang_format
 vignettes/getCurrentVersionsOfCitedPackages.R
+^Contributing.md$

ChangeLog

@@ -1,3 +1,10 @@
+2016-01-09  Dirk Eddelbuettel  <edd@debian.org>
+
+        * Contributing.md: Added to GitHub repo
+
+        * .Rbuildignore: Ensure Contributing.md is not in R package, also
+        removed two old entries
+
 2015-12-29  Joshua Pritikin <jpritikin@pobox.com>
 
         * inst/include/Rcpp/Module.h: Initialize base class in copy ctor