A Project is a
collection of Applications, installed into the same database system, and all using the same
settings file. In a sense, the defining aspect of a project is that it supplies a settings file which specifies the databases to use, the applications to install, and other bits of configuration. A project may correspond to a single web site, but doesn't have to - multiple projects can run on the same site. The project is also responsible for the root URL configuration, though in most cases it is useful to just have that consist of calls to
include which pull in URL configurations from individual Applications.