Initialization feedback for user

[nsheff]

Right now, when you initialize an API client, the response is silent:

api <- BEDbase()

Instead, I suggest printing out some information. You could get some from the /service-info endpoint contents.

https://api.bedbase.org/v1/service-info

Maybe just showing "Connected" and the version, or you could show "6585 BED files available" or something like that.

You can get the count from this endpoint: https://api.bedbase.org/v1/bed/list?limit=0&offset=0

Just some visual cue to show the connection was successful.