Add requirements files for building docs

Refs SHOOP-2532

requirements-doc.in

@@ -0,0 +1,3 @@
+-e .
+Sphinx>=1.3,<2
+django-mptt!=0.8.3

requirements-doc.txt

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+#
+# This file is autogenerated by pip-compile
+# To update, run:
+#
+#    pip-compile --no-annotate --output-file requirements-doc.txt requirements-doc.in
+#
+
+-e .
+alabaster==0.7.8
+babel==2.3.4
+django-bootstrap3==6.2.2
+django-countries==3.4.1
+django-enumfields==0.7.4
+django-filer==1.2.0
+django-jinja==1.4.2
+django-mptt==0.8.4
+django-parler-rest==1.4
+django-parler==1.6.2
+django-polymorphic==0.8.1
+django-registration-redux==1.4
+django-timezone-field==1.3
+django==1.8.13
+djangorestframework==3.3.3
+docutils==0.12
+easy-thumbnails==2.3
+factory-boy==2.7.0
+fake-factory==0.5.3
+imagesize==0.7.1
+jinja2==2.8
+jsonfield==1.0.3
+Markdown==2.6.6
+MarkupSafe==0.23
+pillow==3.2.0
+Pygments==2.1.3
+pytoml==0.1.8
+pytz==2016.4
+requests==2.10.0
+six==1.10.0
+snowballstemmer==1.2.1
+Sphinx==1.4.1
+Unidecode==0.4.19
+
+# The following packages are commented out because they are
+# considered to be unsafe in a requirements file:
+# setuptools