Merge branch 'release/v0.5.1' into develop

* release/v0.5.1:
  Bumps version
[#9] Remove embedded testnet, add as a subdmodule instead
Bumps version
Merge branch 'release/v0.6.0'

* release/v0.6.0:
  Bumps version
  [#9] Remove embedded testnet, add as a subdmodule instead