meta support for solutions and cmd line

[jryannel]

Support to add meta information to the cmd line and the solution. The meta support can be a valid YAML content or can be an external file. In case of an external file all keys under a symbol object shall be valid symbols and injected into the looked up symbols from the parsed system.

symbols:
  demo.Calc:
    - go.module: "github.com/demo/calc"

This will add the go.module meta key to the interface demo.Calc