version up eggs.

also add component/python-PyYAML because cliff 1.15.0 requires PyYAML.

component/python-PyYAML/buildout.cfg

+[buildout]
+extends =
+  ../libyaml/buildout.cfg
+
+[python-PyYAML]
+recipe = zc.recipe.egg:custom
+egg = PyYAML
+rpath =
+  ${libyaml:location}/lib/
+include-dirs =
+  ${libyaml:location}/include
+library-dirs =
+  ${libyaml:location}/lib

component/slapos/buildout.cfg

@@ -78,12 +78,14 @@ rpath =
 [slapos]
 recipe = z3c.recipe.scripts
 eggs =
+  ${lxml-python:egg}
   ${python-cffi:egg}
+  ${python-PyYAML:egg}
+  ${python-cliff:egg}
   ${python-cryptography:egg}
   pyOpenSSL
   slapos.libnetworkcache
   zc.buildout
-  ${lxml-python:egg}
   slapos.core
 
 initialization =

stack/slapos.cfg

@@ -25,6 +25,7 @@ extends =
   ../component/python-cffi/buildout.cfg
   ../component/python-cliff/buildout.cfg
   ../component/python-cryptography/buildout.cfg
+  ../component/python-PyYAML/buildout.cfg
 
 # Separate from site eggs
 allowed-eggs-from-site-packages =
@@ -85,6 +86,7 @@ recipe = zc.recipe.egg
 eggs =
   ${lxml-python:egg}
   ${python-cffi:egg}
+  ${python-PyYAML:egg}
   ${python-cliff:egg}
   ${python-cryptography:egg}
   pyOpenSSL
@@ -109,6 +111,7 @@ zc.recipe.egg = 1.3.2.post4
 hexagonit.recipe.download = 1.7.post4
 
 Jinja2 = 2.8
+PyYAML = 3.11
 Werkzeug = 0.10.4
 buildout-versions = 1.7
 cffi = 1.2.1
@@ -152,13 +155,13 @@ Flask = 0.10.1
 MarkupSafe = 0.23
 
 # Required by:
-# cliff==1.14.0
+# cliff==1.15.0
 # stevedore==1.8.0
 argparse = 1.4.0
 
 # Required by:
 # slapos.core==1.3.10
-cliff = 1.14.0
+cliff = 1.15.0
 
 # Required by:
 # cryptography==1.0.1