[WIP] Basic methods for DigitalOcean DNS

[mmalecki]

This is a WIP. Implemented methods already work.

@kenperkins what do we do with methods which aren't supported by Rackspace? Do we throw in DigitalOcean or limit to subset supported by both providers (so no bulk write methods, mostly)?

[kenperkins]

Can you enumerate the methods which aren't supported by rackspace?

[mmalecki]

I meant the other way: bulk write methods like createZones/updateZones aren't supported by DO.

[kenperkins]

Well we have at least a couple of options:

1. leave bulk functions out of the generalized portion
2. implement bulk functions in the SDK (making multiple calls behind the scenes)
3. ??

I'd go with no 1 for now, as the generalization for DNS is still primitive. See #165 for vocabulary. Maybe this should be moved into https://github.com/nodejitsu/pkgcloud/blob/master/docs/vocabulary.md

[indexzero]

Agree with going for No. 1 here @kenperkins.

@mmalecki Nice work on this. A couple of minor things:

1. We should probably respond with something likenew Error('Not implemented) for all the stubs you didn't implement.
2. I'll defer to @kenperkins here, but he seems pretty gung-ho about method comments in a JSDoc style. We should be consistent for new providers.

[kenperkins]

ping

[mmalecki]

@kenperkins I will do this this weekend, hopefully together with migrating to newer DO API version (I promise!)

[kenperkins]

Keep @mikeal in the loop, he was possibly going to do some DO stuff as well.

[mmalecki]

I'm going to close this since it's going to be implemented in #325.