Add missing LWP::UserAgent dependency in README/Build.PL

Build.PL

@@ -19,6 +19,7 @@ Module::Build->new(
 		'Class::Accessor' => 0,
 		'Exception::Class' => 0,
 		'Getopt::Long' => 0,
+		'LWP::UserAgent' => 0,
 		'XML::LibXML' => 0,
 	},
 	sign => 1,

README

@@ -10,6 +10,7 @@ Dependencies
  * perl version 5.10.1 or newer
  * Class::Accessor
  * Exception::Class
+ * LWP::UserAgent
  * XML::LibXML