Add support for STM32F0xx devices (using templates)

[damaki]

This is a resubmission of #39 with the following updates:

• Eliminated the large number of file variants and replaced them with templated files (using the new template system).
• Bumped copyright years of the STM32F0xx source files to 2020.
• Fixed some issues in the new template system:
  • Fixed template config values not being used when installing linker scripts.
  • ~Fixed case where source files generated from templates do not use the correct line endings on Windows (by default the runtime installer was using CRLF line endings on Windows, but GNAT style rules require LF line endings).~ (this has now been fixed separately in commit 3d1542e)

I've also squashed all changes into a single commit.

[damaki]

@Fabien-Chouteau I've just noticed that this PR is including two of your commits that implemented the template system. I updated and branched off community-2020 when I rebased my changes a couple of days ago, but these commits no longer seem to be on community-2020. Were these commits recently removed from the branch?

[Fabien-Chouteau]

Hello @damaki,

Were these commits recently removed from the branch?

This is my fault, I will fix it ASAP.

[Fabien-Chouteau]

@damaki It's done.

[damaki]

@Fabien-Chouteau thanks for fixing those commits on the community-2020 branch. FYI I have rebased (and force-pushed) my changes in this PR onto the updated branch.

[Fabien-Chouteau]

Hello @damaki, you have to rebase your changes.

[damaki]

Thanks @Fabien-Chouteau , I've rebased my changes and resolved the conflict where we had both fixed the line endings problem in support/files_holder.py (I've removed my change in favour of yours).

[Fabien-Chouteau]

Thank you @damaki we will review the code and get back to you as soon as possible.

[Fabien-Chouteau]

The PR is merged, thank you @damaki !