Update docs to explain purpose of SampleProjects#156

Merged

ianfixes merged 2 commits intoArduino-CI:masterfrom

Oct 6, 2020

Commits on Sep 8, 2020

Update docs to explain purpose of SampleProjects and avoid impression that they are templates to be followed too closely.
James Foster
committed
- Provide alternative `bundle install` command (the original one doesn't work on macOS 10.16).
James Foster
committed