Move autoprogram to doc requirements

Pipfile

@@ -11,6 +11,7 @@ recommonmark = "*"
 alabaster = "*"
 Sphinx = ">=1.4,!=1.5.4"
 alabaster_jupyterhub = "*"
+sphinxcontrib-autoprogram = "*"
 
 [packages]
 repo2docker = {path=".", editable=true}

dev-requirements.txt

@@ -4,4 +4,3 @@ pyyaml
 pytest
 wheel
 pytest-cov
-sphinxcontrib-autoprogram

docs/doc-requirements.txt

@@ -4,3 +4,4 @@ sphinx>=1.4, !=1.5.4
 recommonmark
 alabaster
 alabaster_jupyterhub
+sphinxcontrib-autoprogram