more informative error message

src/DockQ/DockQ.py

@@ -21,8 +21,7 @@
     from .constants import *
 except ImportError:
     warnings.warn(
-        """WARNING: It looks like cython is not working,
-         falling back on native python. This will make DockQ slower"""
+        """Invoking DockQ as script rather than binary. This will slow down computations."""
     )
     from operations_nocy import residue_distances, get_fnat_stats
     from parsers import PDBParser, MMCIFParser