Update files for Rev F

Changed heatbed connector to 5mm pitch screw terminal
Removed E-STOP connector
Changed Y-STOP pin
Moved former Y-STOP pin to SD interface to fix a limitation of the SPI ctlr
Added I2C connector
Replaced trimpots with 4-channel I2C DAC
Added polyfuse and reverse protection diode to fan circuit
Added more empty space around fan connector
Made ICSP and EXP1 connector pins share a 0.1" grid
Removed reset signal from EXP1, and replaced it with GPIO
Changed input PWR connector to a 6-pin one from the same family
Removed stop layer from several vias for future bed-of-nails tester
Change to through-hole mount microUSB connector
Added USB TVS diode pack to protect USB controller from ESD