Bigger font for OLED module

Some OLED module users suggest me adding a bigger font to MultiLCD library, as the 0.96″ SSD1306 based module is kind of tiny-teeny. Here comes the new 16×24 pixels font (digits only).

To use it, please update your library and set the font in your code like this:

lcd.setFont(FONT_SIZE_XLARGE);