Made strings of 404 page customizable

layouts/404.html

@@ -5,8 +5,8 @@
     <section id="wrapper" class="home">
         <article class="post">
             <header>
-                <h1>404 - page not found</h1>
-                <h3>The page you're looking for doesn't seem to exist.</h3>
+                <h1>{{ with .Site.Params.title404 }}{{ . }}{{ else }}404 - Page not found{{ end }}</h1>
+                <h3>{{ with .Site.Params.subtitle404 }}{{ . }}{{ else }}The content you're looking for doesn't seem to exist.{{ end }}</h3>
             </header>
 
             {{ partial "archive.html" . }}

layouts/partials/archive.html

@@ -1,5 +1,5 @@
 <ul id="post-list" class="archive readmore">
-    <h3>Read more</h3>
+    <h3>{{ with .Site.Params.readMore }}{{ . }}{{ else }}Read more{{ end }}</h3>
     {{ range first 10 .Site.Pages }}
     {{ $url := replace .Permalink ( printf "%s" .Site.BaseURL) "" }}
         {{ if ne $url "about/" }}