Add rest server

Creates REST endpoints to support governance log manipulation as outlined in [Issue 1](https://github.com/courage-labs/freefrog/issues/1). Still missing user CRUD, anchor circle CRUD, and user -> role assignment.
The `around` macro is wrapping all `it` blocks in the current context with the redefined bindings. So, the `(it)` is invoking each it block in the current context with the redefined bindings. [Around documentation.](http://speclj.com/docs/around)