Turn ON blue LED in on_irkit_ready()  #4
Merge pull request #5 from shokai/fix_internetapi_led_blink2

Turn ON blue LED in on_irkit_ready()
added LED for ArduinoISP PMODE,ERR,HB.
make ISP work on ATMEGA32U4.
why is this here?
show usb.manufacturer as IRKit
make holes for IRKit ICSP and Wi-Fi header larger to fit pogopin diameter 1.02mm
add HTTP-GET /sensors to read analog-pin 0,1,2,3