Separate bedrock-specific code to a separate repo

[dmitrizagidulin]

It came up in conversation earlier today that the reason this repo is not being used in any of the did client type libraries (did-client, did-io, did-veres-one etc) is that it includes Bedrock components (for example https://github.com/veres-one/veres-one-context/blob/master/lib/index.js#L9 ).

The proposed solution was to have two separate repos, one repo for just the context file itself (probably this one), and then a separate repo that does the importing and injecting of the Bedrock components (that's currently happening in lib/index.js).

[dmitrizagidulin]

Implemented in PR #3, closing.