Add R keyword support. Rename keywords for successful compilation of Java and C# code. More consistent keyword warnings across the different languages.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@10530 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/keyword_rename.i

@@ -3,7 +3,9 @@
  */
 
 %module keyword_rename
-%warnfilter(SWIGWARN_PARSE_KEYWORD);
+
+#pragma SWIG nowarn=SWIGWARN_PARSE_KEYWORD
+
 %inline %{
 
 #define KW(x, y) int x (int y) { return y;} 
@@ -21,6 +23,10 @@ KW(use, next)
 KW(implements, native)
 KW(byte, final)
 
+/* C# Keywords */
+KW(string, out)
+struct sealed {};
+
 %}