Add test cscope.out and tags file

In order to submit this project to `brew` - OS X package manager we also
have to provide some kind of simple test that assures package installed
properly.

By including 2 test files we will be able to generate `codequery` db
with `cqmakedb` and perform `cqsearch` test after that.
Merge pull request #47 from bruno-/brew_test_files

Add test cscope.out and tags file (related to #16)