Updated gitignore to not include the target directory, as that just
contains compiled classes, etc.

Added the concept of a Location, which is effectively a room, in its most
basic, elementary state. Added a sparse parser class for XML files,
WorldParser, and a unit test that fails as the logic is not there yet.
Added a test file with the XML for a single, super-simple world. That test
file effectively models the simplest possible world ever, and is very
boring. (SimpleWorld1-1.xml)