+ Added sites app.
+ Installed sites app.
+ Added Site model.
+ Added first migration.
+ Added Category model.
+ Added migration file.
+ Updated name field in order to be unique.
+ Updated url field in order to be unique.
+ Added migration file.
+ Added Cron model.
+ Added migration file.
+ Added public app.
+ Installed public app.
+ Added basic template.
+ Added home view in public app.
+ Added basic home page.