bin/bookingit in bookingit-0.1.0 vs bin/bookingit in bookingit-0.2.0

@@ -36,17 +36,18 @@
     end
   end
 end
 
 desc 'build your book from markdown files'
+arg_name '[output_dir]'
 command :build do |c|
   c.desc "Use cache for code samples and console sessions"
   c.default_value true
   c.switch :cache
   c.action do |global_options,options,args|
     config = Bookingit::Config.new(File.read('config.json'),File.expand_path('.'))
     config.cache = options[:cache]
-    book = Bookingit::Book.new(config)
+    book = Bookingit::Book.new(config,args.shift)
     book.render_html!
   end
 end
 
 pre do |global,command,options,args|