ist8310 0.1.1

IST8310 magnetometer driver for embedded hal
Documentation
# ist8310

A rust embedded-hal driver for the 
Isentek IST8310 
3-axis magnetometer.

This sensor is claimed to be pin-compatible with the HMC5883 magnetometer. 

## Status

- [x] Basic i2c setup support
- [x] read of main xyz magentometer vector
- [ ] Tests with mock embedded hal
- [ ] Periodic configuration check (for poor i2c connections)
- [ ] Usage example with `cortex-m` hal
- [ ] Doc comments
- [ ] CI
- [ ] support for cross-axis flow calibration