Added 100 ohm resistors to Mosfets. Changed ALL SMD components to 0603.

I added a 100 ohm resistor to the gate of every mosfet. this should help
prevent damage to the MCU.
I changed all of the SMD components to 0603. I've been wanting to do
this for a while. They're not much smaller than 0805, but it allows me
to route things better.