Convert rss icon to svg

Closes: #367

Author: hvynalek

sitestatic/archweb.css

@@ -656,7 +656,7 @@ div.widget {
 /* feeds page */
 #rss-feeds .rss {
     padding-right: 20px;
-    background: url(rss.png) top right no-repeat;
+    background: url(rss.svg) top right no-repeat;
 }
 
 /* artwork: logo images */

sitestatic/rss.png

@@ -17,7 +17,7 @@ <h2>Arch Planet</h2>
 
 <div id="planet">
     <a href="{% url 'planet-feed' %}" title="Planet Arch Linux RSS Feed"
-        class="rss-icon"><img width="16" height="16" src="{% static "rss.png" %}" alt="RSS Feed" /></a>
+        class="rss-icon"><img width="16" height="16" src="{% static "rss.svg" %}" alt="RSS Feed" /></a>
 
     {% for entry in feed_items %}
     <h4>

sitestatic/rss.svg

@@ -43,7 +43,7 @@ <h3>
     </h3>
 
     <a href="/feeds/news/" title="Arch News RSS Feed"
-        class="rss-icon"><img width="16" height="16" src="{% static "rss.png" %}" alt="RSS Feed" /></a>
+        class="rss-icon"><img width="16" height="16" src="{% static "rss.svg" %}" alt="RSS Feed" /></a>
 
     {% for news in news_updates %}{% if forloop.counter0 < 5 %}
     <h4>
@@ -90,7 +90,7 @@ <h3>Recent Updates <span class="more">(<a href="/packages/?sort=-last_update"
             title="Browse all of the latest packages">more</a>)</span></h3>
 
     <a href="/feeds/packages/" title="Arch Package Updates RSS Feed"
-        class="rss-icon"><img width="16" height="16" src="{% static "rss.png" %}" alt="RSS Feed" /></a>
+        class="rss-icon"><img width="16" height="16" src="{% static "rss.svg" %}" alt="RSS Feed" /></a>
 
     <table>
         {% for update in pkg_updates %}