Isolated missing library code to pkg:deb task - couldn't locate library code

(must be available from Debian, or bundled).

Rakefile

@@ -1,5 +1,3 @@
-require 'rake_utils/debian'
-include RakeUtils::DSL
 
 DEBUG  = ENV.has_key?('DEBUG') &&
   %w|yes y ok 1 true t|.include?(ENV['DEBUG'])
@@ -86,7 +84,9 @@ task :clean do
 end
 
 namespace :pkg do  
-  deb do |t|
+  task :deb do |t|
+    require 'rake_utils/debian'
+    
     t.code_files = ALL_SOURCES + ["Rakefile"]
     t.pkg_name = "flexnbd"
     t.generate_changelog!