Add `node_confirms` option to PUT request

[russelldb]

And counter/datatype operations. NOTE: depends on riak-2.2.5 node_confirms feature.

Depends on: https://github.com/basho/riak_pb/pull/228

Depended on: https://github.com/basho/riak_kv/pull/1663

[russelldb]

Travis fails because it doesn't know to use the riak_pb branch that this pull request builds on, is there anyway around that? Change the rebar.config and then change it back before/after merging?

[bryanhuntesl]

Am I correct in understanding the fail is due to the referenced p/r (riak_kv/riak_pb) not having been merged yet ?

[russelldb]

right, but I wonder if we can just tell travis to use the right branch somehow?

[bryanhuntesl]

The only think I could think of would be to send up a .gitconfig with the aproprate aliases in place but that's probably more effort than it's worth. When we get on rebar3, profiles could also be an option; but again, a lot of effort. I'll try to get the two dependent p/r reviewed today.

[russelldb]

merged pb and tada, travis is super-green

[bryanhuntesl]