Add ESP8266 example

examples/esp8266/src/main/component.mk

@@ -0,0 +1,10 @@
+  #
+  # Main component makefile.
+  #
+  # This Makefile can be left empty. By default, it will take the sources in the 
+  # src/ directory, compile them and link them into lib(subdirectory_name).a 
+  # in the build directory. This behaviour is entirely configurable,
+  # please read the ESP-IDF documents if you need to do this.
+#
+
+COMPONENT_INCLUDES += ../../../../..