Split up validate_symbol.
Rework GET.

get_flat has been merged into get, with the server app now taking
responsibility for padding the GET representation to make it valid JSON.
Errors now use respond_with.

A nasty hack had to be done to get the correct status code to appear on errors,
but otherwise all is good.
Separate model structure from Creator.

The model structure is now specified in the configuration.

This should make specifying different model structures easier.
Create the Info model.

This is a set of constants about the Bra instance running, including its
current API version.

The current API version is 0.0.0.