docs: ReadTheDocs configuration

* Adds `docs/requirements.txt` so that ReadTheDocs can install all the
  prerequisites for building the autodoc parts of the documentation.

Signed-off-by: Tibor Simko <[email protected]>

MANIFEST.in

@@ -17,7 +17,7 @@
 # In applying this license, CERN does not waive the privileges and immunities
 # granted to it by virtue of its status as an Intergovernmental Organization or
 # submit itself to any jurisdiction.
- 
+
 include Dockerfile
 include COPYING
 include *.rst
@@ -27,4 +27,5 @@ recursive-include reana_job_controller *.json
 recursive-include docs *.py
 recursive-include docs *.png
 recursive-include docs *.rst
+recursive-include docs *.txt
 recursive-include tests *.py

docs/requirements.txt

@@ -0,0 +1,21 @@
+# This file is part of REANA.
+# Copyright (C) 2017 CERN.
+#
+# REANA is free software; you can redistribute it and/or modify it under the
+# terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+#
+# REANA is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# REANA; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
+# Suite 330, Boston, MA 02111-1307, USA.
+#
+# In applying this license, CERN does not waive the privileges and immunities
+# granted to it by virtue of its status as an Intergovernmental Organization or
+# submit itself to any jurisdiction.
+
+-e .[all]