Added files for the icm20602 sensor used for acceleration and angle speed messurement.

Also added files for bmp280 with function to get height above ocean level and absolute height from the starting position. I used the equations from the data sheet for compensation an a simple low-pass.

Since i don’t have a st-link yet i used a oled display to show the values for height, accelaeration and angle speed. I added the files for that as well.

The ICM uses SPI. The display and BMP280 share the same I2C pins.

I had some problems with getting started because the pins weren’t soldered on yet and some pins didn’t have a stable connection. Everything instantly worked after soldering them on.