Multiple mysqls running

[flatcapco]

Hi thanks for this - feels a better direction than where herd went. One feature I use all the time and means I'm still using dbengin is having multiple versions of mysql running at the same time due to project demands.. without spinning down the other versions - can that go on the roadmap? Also being able to set where the db data is stored is another big win. Thanks

[SyedMuradAliShah]

I've added a PR #155 but its closed by rules.