Merge pull request #499 from grlee77/pytest_4.5_fix

register markers for pytest 4.5 compatibility

Author: grlee77

MANIFEST.in

@@ -15,7 +15,7 @@ recursive-include demo *
 include cythonize.dat
 
 # Add build and testing tools
-include tox.ini
+include tox.ini pytest.ini
 recursive-include util *
 
 # Exclude what we don't want to include

pywt/conftest.py

@@ -0,0 +1,6 @@
+import pytest
+
+
+def pytest_configure(config):
+    config.addinivalue_line("markers",
+                            "slow: Tests that are slow.")