updated README.md download links with linuxarm32 and linuxarm64 links#307

Merged

rsora merged 2 commits intomasterfrom

rsora/update-readme-links

Jul 24, 2019

Commits on Jul 24, 2019

updated README.md download links with linuxarm32 and linuxarm64 links
Roberto Sora
committed
Updated binary usage instructions, from now on the binary inside the archive is always named `arduino-cli`
Roberto Sora
committed