esp8266: Add basic pyb.Pin class; supports output mode only.
diff --git a/esp8266/modpyb.h b/esp8266/modpyb.h
new file mode 100644
index 0000000..87dac52
--- /dev/null
+++ b/esp8266/modpyb.h
@@ -0,0 +1 @@
+extern const mp_obj_type_t pyb_pin_type;