Added push notifications when a build fails or finished

[benbot]

It's a lot nicer getting immediate feedback via a push notification when a build finishes. This way you never really need to look at the terminal other than for logs.

[benbot]

Any idea why that build is failing? I trying go getting on a clean GOPATH and it ran fine.

[ibash]

@benbotwin looks like it might be due to wercker using an old version of go:

$ go version
go version go1.2 linux/amd64
$ go get -t ./...
# github.com/mattn/go-shellwords
../../mattn/go-shellwords/util_posix.go:17: eerr.Stderr undefined (type *exec.ExitError has no field or method Stderr)

You could try adding a wercker.yml with a newer version

[benbot]

apparently wrecker doesn't have any other versions.

Also, i'll clean up these commits and make a new PR once I have this figured out

[ibash]

@benbotwin does box: golang:1.9.1 work?

[benbot]

Nope. @ibash is there a list of wrecker boxes somewhere? I thought it was pulling containers from docker hub, but that doesn't seem to be the case.

[benbot]

@ibash I got the build working and I squashed all the commits here 😄 . Let me know if there's anything you think would need adding or fixing

[ibash]

Thanks @benbotwin! There seems to be one test that is not passing, barring that this is good to go!

[benbot]

@ibash I'm not sure why that failed but it looks all good now :)

[ibash]

Thank you!!