Merge remote branch 'etaque/sinatra-options'

bin/gollum

@@ -26,6 +26,10 @@ opts = OptionParser.new do |opts|
     options['port'] = port.to_i
   end
 
+  opts.on("--bind [HOST]", "Hostname or IP address to listen on (default 0.0.0.0).") do |host|
+    options['bind'] = host
+  end
+
   opts.on("--version", "Display current version.") do
     puts "Gollum " + Gollum::VERSION
     exit 0