Copied note to readme on non-standard libraptor2 path

README.md

@@ -168,6 +168,13 @@ Mac and the most common Linux and BSD distributions:
     % [sudo] pkg_add -r raptor               # FreeBSD
     % [sudo] pkg_add raptor                  # OpenBSD / NetBSD
 
+If the `libraptor2` library is in the standard library search path, and
+the `rapper` command is in the standard command search path, all should
+be well and work fine out of the box. However, if either is in a
+non-standard location, be sure to set the `RDF_RAPTOR_LIBPATH` and/or
+`RDF_RAPTOR_BINPATH` environment variables appropriately before
+requiring `rdf/raptor`.
+
 Download
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lib/rdf/raptor.rb

@@ -57,15 +57,15 @@ module RDF
   #   RDF::Format.for(:content_type   => "application/xhtml+xml")
   #
   # {RDF::Raptor} includes an FFI implementation, which loads the
-  # `libraptor` library into the Ruby process, as well as a CLI
+  # `libraptor2` library into the Ruby process, as well as a CLI
   # implementation, which drives the `rapper` command-line tool in a
   # sub-process.
   #
-  # The FFI implementation is used by default unless the `libraptor` library
+  # The FFI implementation is used by default unless the `libraptor2` library
   # cannot be found, or if the `RDF_RAPTOR_ENGINE` environment variable is
   # explicitly set to `'cli'`.
   #
-  # If the `libraptor` library is in the standard library search path, and
+  # If the `libraptor2` library is in the standard library search path, and
   # the `rapper` command is in the standard command search path, all should
   # be well and work fine out of the box. However, if either is in a
   # non-standard location, be sure to set the `RDF_RAPTOR_LIBPATH` and/or