add call for papers deadlines block

[alee]

E.g.,

Call For Papers Deadlines
Feb 11, 2018 - Computational Social Science Summer School on Conflicts
Feb 15, 2018 - ACE at the Westerns
Feb 15, 2018 - Computational Models in Archaeology
Feb 18, 2018 - Spring School on Complex Networks
Mar 15, 2018 - Vision, Decision and Leadership