moved panzer into separate file, added 404 error handler, removed profile html page

app/simple_routes.py

@@ -1,5 +1,5 @@
 from app import app
-from flask import send_from_directory, redirect, url_for
+from flask import send_from_directory, redirect, url_for, render_template
 import mistune
 import os
 
@@ -19,4 +19,9 @@ def favicon():
 
 @app.errorhandler(401)
 def unauthorized(e):
-    return redirect(url_for('login'))
+    return redirect(url_for('login'))
+
+@app.errorhandler(404)
+def page_not_found(e):
+    # note that we set the 404 status explicitly
+    return render_template('404.html'), 404