Move acknowledgements in docs

docs/docs/acknowledgements.rst

@@ -0,0 +1,12 @@
+.. include global.rst
+
+Acknowledgements
+================
+
+- Takafumi Arakaki (@tkf) for creating a solid test environment and a lot of
+  other things.
+- Danilo Bargen (@dbrgn) for general housekeeping and being a good friend :).
+- Guido van Rossum (@gvanrossum) for creating the parser generator pgen2
+  (originally used in lib2to3).
+
+.. include:: ../../AUTHORS.txt