[request] MicroPython support

[biemster]

For resource constrained devices, who often run OpenWrt which has MicroPython in its repo, this package would make a lot of sense since for example I2C and SPI are used a lot on those.

I've been trying to get the SPI code working on this, as a drop in replacement for machine.SPI, and need to make a couple adjustments since ctypes is missing a couple types, array has no buffer_info() and stuff like that. Also machine.SPI has several read and write functions, not just transfer.

It would be awesome to see the other peripherals ported as well.