feat: allow getting installed binary path

[achingbrain]

Lets you install this module locally or globally, it's up to you!

If you install it locally though, you probably want to know where the binary is installed:

const ipfs = require('go-ipfs')

console.info('ipfs is installed at', ipfs.path())

Essentially adds the downloading bit of ipfs/npm-go-ipfs-dep to this module, so you can either:

$ npm install --save go-ipfs
// cool, it's in my project as a dep now

or

$ npm install -g go-ipfs
// it's installed globally for my node install!

I've also removed the old jenkins config as we don't use it any more and added similar github actions for publishing to ipfs/npm-go-ipfs-dep. That module should be retired and this one moved to the main ipfs org.

Closes https://github.com/ipfs/npm-go-ipfs-dep/issues/42

[Stebalien]

I like the idea but I'm way out of my depth here.

[achingbrain]

@Stebalien can this be merged & released?

[Stebalien]

Ah, sorry, I assumed you had write access. cc @daviddias.

[Stebalien]

@achingbrain I can't cut a new release without a new go-ipfs release, apparently.