switch to OLEDMP for display

Added font_5x7 support and updated the mooltipass app to use the new OLEDMP library and display functions.

App size with old Oled OLED and GRAPHICS library:
Program:   29566 bytes (90.2% Full)
(.text + .data + .bootloader)

Data:        980 bytes (38.3% Full)
(.data + .bss + .noinit)


App size with new OLEDMP library:
Program:   20272 bytes (61.9% Full)
(.text + .data + .bootloader)

Data:        262 bytes (10.2% Full)
(.data + .bss + .noinit)