After Z, next subpath starts at same position (#53)

* After Z, next subpath starts at same position

Fixes #52

* removed old comment to mirror new behavior

svgpathtools/parser.py

@@ -80,8 +80,7 @@ def parse_path(pathdef, current_pos=0j):
                 segments.append(Line(current_pos, start_pos))
             segments.closed = True
             current_pos = start_pos
-            start_pos = None
-            command = None  # You can't have implicit commands after closing.
+            command = None
 
         elif command == 'L':
             x = elements.pop()