initial sphinx docs

starts #69

- basic structure
- RTD theme
- installation
- quickstart (more to do)
- references
- added start page with license and links to repo and issues
- authors in docs: papers and repo contributors (to be discussed)

docs/source/references.rst

@@ -0,0 +1,23 @@
+.. -*- coding: utf-8 -*-
+
+============
+ References
+============
+
+.. [Sondergaard2011] C. R. Søndergaard, M. H. M. Olsson, M. Rostkowski,
+                     and J. H. Jensen. Improved treatment of ligands
+                     and coupling effects in empirical calculation and
+                     rationalization of pKa values. *Journal of
+                     Chemical Theory and Computation*,
+                     7(7):2284–2295, 2011.
+		     doi: `10.1021/ct200133y <https://doi.org/10.1021/ct200133y>`_
+
+
+.. [Olsson2011] M. H. M. Olsson, C. R. Søndergaard, M. Rostkowski,
+                and J. H. Jensen. PROPKA3: Consistent treat- ment of
+                internal and surface residues in empirical pKa
+                predictions. *Journal of Chemical Theory and
+                Computation*, 7(2):525–537, 2011.
+		doi:
+		`10.1021/ct100578z <https://doi.org/10.1021/ct100578z>`_
+