Add support emojis (#184)

* layout, index: render markdown emoji in section titles
* exampleSite, config: enable emoji rendering in markdown files

layouts/index.html

@@ -110,7 +110,7 @@
         <div class='post-holder{{ if and (ne .Site.Params.invertSectionColors true) (not (modBool $index_val 2)) }} dark{{ else if and (eq .Site.Params.invertSectionColors true) (modBool $index_val 2) }} dark{{ end }}'>
             <article id='{{ anchorize $fnav_title }}' class='post {{ if eq $index_val 0 }}first{{ end }} {{ if eq (add $index_val 1) (len $content) }}last{{ end }}'>
                 <header class="post-header">
-                    <h2 class="post-title">{{ .Title | safeHTML }}</h2>
+                    <h2 class="post-title">{{ .Title | emojify | safeHTML }}</h2>
                 </header>
                 <section class="post-content">
                     {{ .Content }}