Added appearance table.

migrations/02_appearance.sql

@@ -0,0 +1,5 @@
+CREATE TABLE appearance (
+    id SERIAL PRIMARY KEY,
+    banner VARCHAR,
+    text VARCHAR
+)

migrations/03_banner_style.sql

@@ -0,0 +1,3 @@
+ALTER TABLE appearance ADD style_wide VARCHAR;
+ALTER TABLE appearance ADD style_narrow VARCHAR;
+ALTER TABLE appearance ADD title VARCHAR;