Update interface.lib (rearrangement, clean-up, symbols added)

MAX31855 Thermocouple Interface has been added to `interface.lib`
Update `interface.lib` to match KiCad Library Convention with some clean-up's
* Pins has been arranged at 100mil grid
* Pin descriptions and other text has been changed to 50mil text height
* IR2110 removed because this symbol already existed in `ir.lib`
* FTDI's components has been moved to separate `ftdi.lib`