Upload interface for CI integration

[szuecs]

Make it possible to upload from CI systems, Makefiles and for example from https://github.com/goreleaser/goreleaser to the patch-service. Should think about having the same naming convention like goreleaser, which is:

# The default is `{{ .ProjectName }}_{{ .Version }}_{{ .Os }}_{{ .Arch }}{{ if .Arm }}v{{ .Arm }}{{ end }}

The base requirements are binary name, version, GOOS, GOARCH and we should think about ARM, too.