Install slapos-cookbook section from slapos stack.

This automatically handle lxml installation.

software/backupserver/software.cfg

 [buildout]
 extends =
-  ../../component/lxml-python/buildout.cfg
   ../../component/dash/buildout.cfg
   ../../component/dcron/buildout.cfg
   ../../component/logrotate/buildout.cfg
@@ -12,11 +11,10 @@ extends =
   ../../component/rsync/buildout.cfg
   ../../component/dropbear/buildout.cfg
   ../../component/grep/buildout.cfg
-  ../../stack/flask.cfg
+#   ../../stack/flask.cfg
   ../../stack/slapos.cfg
 
 parts =
-  eggs
   rdiff-backup
 #   duplicity
   dcron
@@ -30,6 +28,7 @@ parts =
   template-pullrdiffbackup
   template-backup-script
   template-crontab-line
+  slapos-cookbook
 
 [networkcache]
 # signature certificates of the following uploaders.
@@ -161,11 +160,6 @@ signature-certificate-list =
   m711+GzlW5xe6GyH9SZaGOPAdUbI6JTDwLzEgA==
   -----END CERTIFICATE-----
 
-[eggs]
-recipe = zc.recipe.egg
-eggs =
-  ${lxml-python:egg}
-
 ##########################################################
 # Service startup scripts and configuration files
 ##########################################################
@@ -290,3 +284,7 @@ xml-marshaller = 0.9.7
 # slapos.core==0.35.1
 zope.interface = 4.0.5
 
+cliff = 1.4
+cmd2 = 0.6.5.1
+prettytable = 0.7.2
+requests = 1.2.3