Move static routes into a blueprint

and update templates

Routes:
* /help
* /rules
* /xmlns/nyaa
* /about (commented out)

nyaa/views/__init__.py

@@ -0,0 +1,5 @@
+from nyaa.views import (
+    site,
+)
+
+site_bp = site.bp

nyaa/views/site.py

@@ -0,0 +1,23 @@
+import flask
+
+bp = flask.Blueprint('site', __name__)
+
+
+# @bp.route('/about', methods=['GET'])
+# def about():
+#     return flask.render_template('about.html')
+
+
+@bp.route('/rules', methods=['GET'])
+def rules():
+    return flask.render_template('rules.html')
+
+
+@bp.route('/help', methods=['GET'])
+def help():
+    return flask.render_template('help.html')
+
+
+@bp.route('/xmlns/nyaa', methods=['GET'])
+def xmlns_nyaa():
+    return flask.render_template('xmlns.html')