Add new Thunderpack v1.1: STM32F411#1013

Merged

fpistm merged 7 commits intostm32duino:masterfrom

jgillick:thunderpack1.1-stm32f4xx

Mar 30, 2020

Commits on Mar 27, 2020

Merge ThunderPack variants in one
fpistm
committed

Commits on Mar 28, 2020

Remove unused value.
jgillick
committed

Commits on Mar 30, 2020

Revert "Remove unused value."
jgillick
committed