Updated app.yaml:

   - App name is now completely lowercase, and has dashes as word separators
   - Handlers for static pages (including 404) and directories added. 'not_found.html' will be served for invalid URL requrests.
   - Home page (now linked to home.py) does not require login. Instead, all logic will be within the '/manage/' folder (linked to manage.py), and users will be required to login to store their skill tree configurations.
   - Admin handler added (linked to admin.py). This will allow admins to control the app