Added readme

README.md

+# psrdada-cpp
+
+psrdada-cpp provides C++ wrappers for a subset for PSRDADA functionality (HDUs,
+read/write clients, etc.) and data processing pipelines build with them.
+
+The documentation of psrdadad-cpp can be found at: http://mpifr-bdg.pages.mpcdf.de/psrdada_cpp/
+

doc/index.rst

-PSRDADA CPP Documentation lorem Ipsum
+=========================
+PSRDADA-CPP Documentation
+=========================
 
+psrdada-cpp provides C++ wrappers for a subset for `PSRDADA
+<http://psrdada.sourceforge.net/>` functionality (HDUs, read/write clients,
+etc.) and data processing pipelines build with them.
 
 Contents
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