Added LCD_FONT in lcdLib.h which is the bitmask to enable 5x8 or 5x10
font when doing the function set instruction (in the definition of
initLCD).
LCD_FONT_5x8 or LCD_FONT_5x10 should be defined to enable the intended
font. One always needs to be defined.
Signed-off-by: Collin J. Doering <collin.doering@rekahsoft.ca>