Merge base templates. Add database support. Add blueprint for main.

app/main/__init__.py

@@ -0,0 +1,5 @@
+from flask import Blueprint
+
+main = Blueprint('main', __name__)
+
+from . import views

app/main/views.py

@@ -0,0 +1,7 @@
+from flask import render_template
+from . import main
+
+
+@main.route('/')
+def index():
+    return render_template('main/index.html.j2')