improve handling of noscript (related to #349)

[jsoref]

This is a rough attempt at improving the behavior of cla-assistant as seen by browsers that render <noscript>

Currently the rendering looks like this:

(That the username disappears long before the brand logo is a little odd, but we can cross the mobile bridge later.)

[CLAassistant]

All committers have signed the CLA.

[jsoref]

As an aside, when I do enable JS, I get:

Failed to load resource: the server responded with a status of 401 ()

for /api/github/call:

{obj: "users", fun: "get", arg: {}}
arg: {}
fun: "get"
obj: "users"

Which results in the Hey message disappearing:

<div ng-show="!!user.value.login" class="ng-hide">
                    <a target="spcae">
                        <img style="height:25px;">
                        </a><a class="navbar-text-hide">&nbsp; Hey,
                            <b class="ng-binding"></b>!</a>
                    
                </div>

[coveralls]

Coverage remained the same at 90.013% when pulling 9780f27 on jsoref:issue-349 into 64edc29 on cla-assistant:master.

[KharitonOff]

Thank you very much for looking into it, appreciate your work! But this wouldn't solve the general problem that the whole application is written in JS and wouldn't work in 'no JS'-mode anyway.

[jsoref]

@KharitonOff : the message can be adjusted...

[KharitonOff]

Ok, I see. If we make it clear in a <noscript> tag that CLA assistant needs JS in order to work properly, then it makes sense for me.

[jsoref]

If you want to write that text, I can integrate it, or you can merge this and work from it.