The v1.0.1 release

The v1.0.0 release.

Update DAL for fix to compass heading north/south mirroring.

Allow button pins to be used as digital-in, update DAL.

Fix soft-reset button when on battery and update DAL.

Error messages without trace info are now scrolled on the display and…

… memory management tuning

Feature freeze and getting ready for final 1.0.0

For testing prior to v1.0.0 release.

The version at https://python.microbit.org/v/1