Feature/go deps

[knoxfighter]

I've changed our package management to the modern go modules. These go modules are included in every go installation, so no additional software is necessary.
To build the go code, it has to be OUTSIDE of the GOPATH or run with GO111MODULE=on. Also the Code can only build with go 1.11 onwards. I recommend using go 1.13.
Additionally i changed the Makefile to work with go modules. I also cleaned up the Makefile, it had a lot of deprecated things in it.

Useful go modules commands:

• go list -u -m -json all | go-mod-outdated -update -direct to get a list of outdated dependencies. If not installed: https://github.com/psampaz/go-mod-outdated
• go get -u ./... Update all dependencies or edit the go.mod file manually
• go mod tidy cleanup go.mod and remove all no-longer-needed dependencies
• go get will install a dependency like normal
  https://github.com/golang/go/wiki/Modules

This PR has to be updated, when #158 is merged, or vice versa :)

[knoxfighter]

After thinking a bit, this would fix the problems in #158. So i would merge this before the other one :)

[BarronKane]

I just started to go down this path, good think I checked the PRs. I've been wrestling with the vendor paths for awhile without luck.

[mroote]

This is great! Apologies for the late response.

I started converting to the new modules in my branch but got stuck on the vendor paths for the lockfile dep. Nice job getting it working thanks!