Support for bucket-types and datatypes

[LnL7]

Currently rekon only shows buckets from the default bucket-type, it would be great to have support for Riak 2.0. However I'm not sure if there's a way to list active bucket types.

[dmitrizagidulin]

@LnL7 - That's the problem, unfortunately. There's currently no public API to list active bucket types.

We're working on a prototype tool to replace Rekon, that will address this issue.

[LnL7]

I was thinking that the install script could use riak-admin to generate a list of active bucket types.

[mogadanez]

it can be "manual" for now by url
buckets/rekon/keys/go#/types/animals - lists all buckets inside animals type
buckets/rekon/keys/go#/types/animals/buckets/cats list key in cats bucket in animals type