Add template control flow to display login & sign or username

- Also commit the relevant TTF font for the myspace logo in the previous commit

templates/layouts/header.html

@@ -2,7 +2,11 @@
     <div class="header-primary">
         <span id="logo">runnerspace</span>
         <div class="header-login">
+            {% if logged_in %}
             Logged in as <a href="/user/{{ user.username }}" class="username">{{ user.username }}</a>
+            {% else %}
+                <a href="/login">Login</a> or <a href="/signup">Sign-up</a>!
+            {% endif %}
         </div>
     </div>
     <nav class="header-secondary">