Clean up FRBC-specific content about cbd

[ssordopalacios]

On the topic of removing FRBC-specific language, I think our best bet is to wait until v2.0.0 and then release that, with everything squashed into "Initial commit", and then go from there. We can maintain a GitLab-specific version of cbd prior to that version, but any future issues go on GitHub.

[ssordopalacios]

But to answer your question: we nixed that default chidata directory, but if I would be fine with specifying it in a configuration file somewhere in the project that has the work-tree skipped.

When it comes to the Haver folder, I actually think Haver likes the R:/_appl/HAVER/DATA, but we could also just specify that, the Bloomberg jar file path, and the FRED API Key in the same configuration file.

In v2.0.0, I wrote helper functions like cbd.source.connectBloomberg() that handle all of the connection-setting and checking. So all these would have to do is read the configuration file.