Stubgen curses (and _curses)

Manual tweak to remove reference to curses.has_key (which is a fallback
for when the C module doesn't have it)

stdlib/3/curses/__init__.pyi

@@ -0,0 +1,12 @@
+# Stubs for curses (Python 3.5)
+#
+# NOTE: This dynamically typed stub was automatically generated by stubgen.
+
+from _curses import *
+# Stubgen imports a python version of has_key only if it's not present
+#in _curses (which it is in this stub)
+# from .has_key import has_key as has_key
+
+def initscr(): ...
+def start_color(): ...
+def wrapper(func, *args, **kwds): ...