Implements a PID Controller as a GenServer.
For more details about PID Controllers see the Wikipedia article.
If available in Hex, the package can be installed
by adding ex_pid_controller to your list of dependencies in mix.exs:
defdepsdo[{:ex_pid_controller,"~> 0.1.0"}]endDocumentation can be generated with ExDoc and published on HexDocs. Once published, the docs can be found at https://hexdocs.pm/ex_pid_controller.