Update MANIFEST.in

Author: pancetta

MANIFEST.in

@@ -7,6 +7,8 @@ include .flake8
 include Doxyfile
 include LICENSE
 include data/README
+include *.cff
+include pytest.ini
 
 recursive-include docs *.bat
 recursive-include docs *.py
@@ -17,4 +19,4 @@ recursive-include pySDC *.npy
 recursive-include pySDC *.npz
 recursive-include pySDC *.pkl
 recursive-include pySDC *.rst
-recursive-include pySDC *.txt
+recursive-include pySDC *.txt