Create official REST API client

[nathanielc]

It is time to start locking down the HTTP REST API. The first step is to write an official golang client. We will also update the kapacitor command to use this client.

[upccup]

@nathanielc Hi i want to know you plan of add an an official golang client. This task have a timetable yet? 💯

[nathanielc]

@upccup WIP PR already at #393

[upccup]

@nathanielc is great of #393 . But there has a question. Can we use object replace TICKscript?

[upccup]

@nathanielc is great of #393 . But there has a question. Can we use object replace TICKscript?

[nathanielc]

@upccup If you call the Define method and specify only the name and script parameters then the TICKscript will be replaced.

[upccup]

@nathanielc that's great and . When are you going to merged it?