Add LICENSE file to repository

[mithro]

What license is this under?

[folknology]

Hi Tim, This is complicated, the hardware stuff is under a solderpad licence the rest I want under something like BSD, however I need to look at the ST HAL stuff as that has it's own licence I think.

[folknology]

Actually the ST stuff has different licencing specified in the file headers (Our firmware links to these)

[folknology]

For all hardware SolderPad licence (including examples) for others check headers, added BSD iceboot https://github.com/folknology/IceCore/commit/eb65e89d011e57bfce94b403b8d756e88241cdc7

[folknology]

Let me know if that solves things for you and I can close this