[Command Line] Fixed bug that caused the --write-configuration option to break.

lib/compass/commands/write_configuration.rb

@@ -15,6 +15,10 @@ module Compass
         installer.write_configuration_files
       end
 
+      def installer_args
+        [nil, project_directory, options]
+      end
+
     end
   end
 end

lib/compass/installers/base.rb

@@ -14,7 +14,7 @@ module Compass
         @target_path = target_path
         @working_path = Dir.getwd
         @options = options
-        @manifest = Manifest.new(manifest_file)
+        @manifest = Manifest.new(manifest_file) if template_path
         self.logger = options[:logger]
       end