Change I  per issue 55
Change I  per issue 55

Per issue https://github.com/adafruit/Adafruit_LED_Backpack/issues/55 - 

Replace 0b0001001000000000, // I with 0b0001001000001001, // I 

This adds the bar on top (segment A) and bottom (segment D) for easier reading of capital I to to make it easier to tell from the number "1" and lower case L.
adafruit/Adafruit-LED-Backpack-Library,adafruit/Adafruit_LED_Backpack