fixed to handle pointer method

[sio4]

Hi @markbates and @stanislas-m,
I open a PR to fix the behavior of plush when we call a method of structure which has pointer receiver.
(related to gobuffalo/buffalo#1479)

When the model looks like

type Robot struct {
    name string
}

func (r *Robot) Name() string {
    return r.name
}

and we wrote templates like

<%= robot.Name() %>

in show.html which is robot is already a pointer or

<%= for (robot) in robots { %>
<%= robot.Name() %>
<% } %>

in index.html which is robot in the loop is not a pointer.

Currently, the first template works fine as user expected but the code was translated into the same result of robot.String() in second template. If this is not a designed behavior(I think so), this PR makes the same results from these two cases.

[sio4]

FYI, One of windows test is not successfully finished with error: go: command not found

[lukasschlueter]

FYI, One of windows test is not successfully finished with error: go: command not found

That's a problem with gimme, saw that several times now. I restarted the job, that seemed to have helped the last time.

[sio4]

Thanks @lukasschlueter.
Yes, I also saw the failure several times and it is too slow :-)