Removed useless files. Added charset in scss file.

_assets/core.scss

@@ -10,6 +10,7 @@
 #};
 ---
 
+@charset "utf-8";
 @import 'main';
 @import 'syntax';
 

_assets/gravatar_wrapper.svg

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="100px" height="100px" viewBox="0 0 100 100" enable-background="new 0 0 100 100" xml:space="preserve">
-    <rect width="100" height="100" style="fill:rgb(191,191,191)"/>
-</svg>