Add flake8 linting

Author: quantum5

.flake8

@@ -0,0 +1,2 @@
+[flake8]
+max-line-length = 120

win2xcur/parser/ani.py

@@ -83,4 +83,4 @@ def _parse(self, offset):
         for frame, delay in zip(sequence, delays):
             frame.delay = delay / 60
 
-        return sequence
+        return sequence

win2xcur/parser/cur.py

@@ -36,4 +36,4 @@ def _parse_header(self):
             hotspots.append((hx, hy))
             offset += self.ICON_DIR_ENTRY.size
 
-        return hotspots
+        return hotspots