* Add a new directory with unit tests (/tests/)
* Run `make test` in this directory to execute all these unit tests and get reports from them if they fail
* Add a single unit test to the directory which tests level_parser.y and the input it should & shouldn't accept
git-svn-id: svn+ssh://svn.gna.org/svn/warzone/trunk@4883 4a71c877-e1ca-e34f-864e-861f7616d084