[WIP] Update dependencies and iron 0.4 transition

[onur]

This patch updates dependencies, but looks like there is a problem on templates.

@sunng87 I hope you can help :-)

cargo update performed:

    Updating handlebars v0.16.1 -> v0.18.2
    Updating handlebars-iron v0.15.2 -> v0.15.3
    Updating iron v0.3.0 -> v0.3.1

But looks like this template is no longer working. Problem is getting items from a vector of tuples. I have authors: Vec<(String, String)> and I was getting them with:

{{#each authors}}
<li class="pure-menu-item"><a href="/releases/{{this.[1]}}" class="pure-menu-link">{{this.[0]}}</a></li>
{{/each}}

This syntax is a RenderError now and this.[0] is no longer working.

[sunng87]

Could you please update to handlebars-iron 0.18 which uses handlebars 0.20.5?
This should be fixed in that version.

[onur]

@sunng87 looks like I have to upgrade iron to 0.4 as well.

[sunng87]

I see. Is there any road blocker for upgrading to iron 0.4?
If you have issue with upgrading, I will make a back-port later.

[onur]

Since everything is working fine with the current version, there is no need to back-port.

Upgrading iron is causing some problems. I was manipulating iron::Url.path in rustdoc handlers but it is no longer possible in iron 0.4 and I have to write a workaround.

I'll focus on more important issues rather than upgrading dependencies for now.