esp8266/README.md: Update feature list for current state of affairs.

esp8266/README.md

@@ -13,15 +13,11 @@ Currently implemented features include:
 - Builtin modules: gc, array, collections, io, struct, sys, esp, network,
   many more.
 - Arbitrary-precision long integers and 30-bit precision floats.
-- Basic WiFi support.
+- WiFi support.
 - Sockets using modlwip.
 - GPIO and bit-banging I2C, SPI support.
 - 1-Wire and WS2812 (aka Neopixel) protocols support.
-
-On the TODO list:
-- Full wifi support.
 - Internal filesystem using the flash.
-- ...
 
 Work-in-progress documentation is available at
 http://docs.micropython.org/en/latest/esp8266/ .