Bugfix: STATIC_ROOT cannot be in STATICFILES_DIRS
Fixed 3 ContentAccessTests and Modified settings.py

Fixed 3 tests that fail because the templates directory was moved
from s13sitecore to s13sitedemo.

Additionally, modified settings.py to include a DATABASE_NAME
variable that contains the sqlite3 database name. I did for easy
access to that string. I'm planning to ship the app with a demo
database, which will not be defined in .gitignore (unlike the
testdb.sqlite3 that we'll be using for development).