We now removed the need for Boost:chrono in all the libs, to avoid
accidentally linking to it again this change makes the apps link to
the actual specific libs instead of just all.
To enable this means the buildsystem will build all the applications
as well as the libraries.
Applications are 'hub' / 'txVulcano' / 'indexer' etc.
Default this one is turned off.
These are technically static libs, but not in any way shared libs.
They are used solely only by this repo and really only by the hub.
Most important, no header files are installed and basically none of
the normal rules for reusable libraries are applied to these files.
This is a partial app which has as goal to generate transactions
and fill up blocks. A needed tool to test bigger blocks.
Secondairy goal is to test the Hub APIs in actual production
setting.