[mqtt] Migrated dependencies to bundlerepo.org
[mqtt] Tmp: system doc work
Revert "[helloworld] Updated for new-style repopaths"

This reverts commit 360a980105d082c9218d30ee10096862ab68a271.
Revert "[helloworld] Converted to file: URI repopaths"

This reverts commit dea38d890160fe3d17661eec1fe043aee1a8e128.
Revert "[helloworld] Added simple activator-based example"

This reverts commit 4484a7bb0a210f7bb3fa89d75c3a6e4d72795bc7.
Revert "[helloworld] Modernised project structure"

This reverts commit b7bfa6a599405b24971f8c51bc8032670b9e0766.