Restore full git history

[AlecThomson]

Restores the full git history from the original RM-Tools repo. This was lost in the migration to the CIRADA-Tools repo since a copy was done rather than a fork/clone.

This history was restored using the following git commands:

git remote add original https://github.com/crpurcell/RM-tools.git
git merge original/master --allow-unrelated-histories --strategy=ours

The --strategy=ours resolved all conflicts by choosing commits from the CIRADA-Tools repo. Its possible that a more slick merge of the histories is possible, but that would require a lot fiddling.