Added cheap lazy templates + logic to switch between setting controllers

templates/settings.html

@@ -0,0 +1,35 @@
+<div class="vertical-centerer">
+  <div 
+  	data-setting="user" 
+  	class="tool-icon gear-icon" 
+  	title="Preferences" 
+  	rel="tooltip" data-placement="left"></div>
+  
+  <a 
+  	class="tool-icon gallery-icon" 
+  	title="Visit gallery" 
+  	href="http://juliandescottes.github.io/piskel-website/" 
+  	rel="tooltip" data-placement="left" target="_blank"></a>
+  
+  <div 
+  	class="tool-icon save-icon" 
+  	title="Save to gallery" 
+  	onclick="pskl.app.storeSheet()" 
+  	rel="tooltip" data-placement="left" ></div>
+  
+  <div 
+  	data-setting="gif"
+  	class="tool-icon upload-cloud-icon" 
+  	title="Upload as an animated GIF" 
+  	rel="tooltip" data-placement="left">
+    <span class="label">GIF</span>
+  </div>
+  
+  <div 
+  	class="tool-icon upload-cloud-icon" 
+  	title="Upload as a spritesheet PNG" 
+  	onclick="pskl.app.uploadAsSpritesheetPNG()" 
+  	rel="tooltip" data-placement="left">
+    <span class="label">PNG</span>
+  </div>
+</div>