Handle file not found for windows file urls. (#11)

* Handle file not found for windows file urls.

* Update common.py

Author: Maxwell175

Lib/__np__/common.py

@@ -188,7 +188,12 @@ def download_file(url, destination):
             raise
     except URLError as e:
         # Seems that macOS throws this error instead for file:// links. :(
-        if 'Errno 2' in str(e.reason):
+        if 'Errno 2' in str(e.reason) or 'WinError 3' in str(e.reason):
+            raise NoSuchURL(url)
+        else:
+            raise
+    except OSError as e:
+        if e.errno == 2:
             raise NoSuchURL(url)
         else:
             raise