Deprecation messages fixes. (#196)

* Fixes #180.

* Trying to fix .RSSLink deprecation message.

layouts/_default/baseof.html

     {{/* NOTE: the Site's title, and if there is a page title, that is set too */}}
     <title>{{ block "title" . }}{{ .Site.Title }} {{ with .Params.Title }} | {{ . }}{{ end }}{{ end }}</title>
     <meta name="viewport" content="width=device-width,minimum-scale=1">
-    {{ .Hugo.Generator }}
+    {{ hugo.Generator }}
     {{/* NOTE: For Production make sure you add `HUGO_ENV="production"` before your build command */}}
     {{ if eq (getenv "HUGO_ENV") "production" | or (eq .Site.Params.env "production")  }}
       <META NAME="ROBOTS" CONTENT="INDEX, FOLLOW">
       {{ partialCached "site-favicon.html" . }}
     {{ end }}
 
-    {{ if .RSSLink }}
-      <link href="{{ .RSSLink }}" rel="alternate" type="application/rss+xml" title="{{ .Site.Title }}" />
-      <link href="{{ .RSSLink }}" rel="feed" type="application/rss+xml" title="{{ .Site.Title }}" />
+    {{ if .OutputFormats.Get "RSS" }}
+      <link href="{{ .OutputFormats.Get "RSS" }}" rel="alternate" type="application/rss+xml" title="{{ .Site.Title }}" />
+      <link href="{{ .OutputFormats.Get "RSS" }}" rel="feed" type="application/rss+xml" title="{{ .Site.Title }}" />
     {{ end }}
 
     {{/* NOTE: These Hugo Internal Templates can be found starting at https://github.com/spf13/hugo/blob/master/tpl/tplimpl/template_embedded.go#L158 */}}