casing; .Rbuildignore tweaks

Author: kevinushey

.Rbuildignore

@@ -1,5 +1,5 @@
 ^.*\.Rproj$
 ^\.Rproj\.user$
-^gen/
-^nt2/
-^patch/
+^gen$
+^nt2$
+^patch$

R/plugin.R

@@ -7,6 +7,6 @@ inlineCxxPlugin <- function() {
         "-include", system.file("include/RcppNT2.h", package = "RcppNT2")
       )
     ),
-    includes = "#include <RcppNt2.h>"
+    includes = "#include <RcppNT2.h>"
   )
 }