Support jennifer ImportName, ImportAlias

[MrEhbr]

There are new mechanism to add alias in https://github.com/dave/jennifer
It will be great if Gokit-cli will not generate code like

package http

import (
        context "context"
        json "encoding/json"
        errors "errors"
        endpoint "github.com/User/project/pkg/endpoint"
        http1 "github.com/go-kit/kit/transport/http"
        http "net/http"
)

If you have thoughts how to do that i could help

[kujtimiihoxha]

Hey there

I did not have the time to look at kit for a while, I have nothing against using the new features of jennifer but I don't think I will have time to implement it in the near future.

Thanks for the suggestion and I would be glad to review and merge any PR related to this proposal.