Configure travis CI to create initial directories

.travis.yml

@@ -11,6 +11,7 @@ before_script:
   - bundle exec rake db:create db:migrate db:test:prepare
   # GNU echo requires non-stardard option `-e' to interpret escapes sequences
   - 'echo -e "test:\n  secret_key_base: $(bundle exec rake secret)" > config/secrets.yml'
+  - mkdir -p data/sounds data/test/sounds
 script: bundle exec rspec
 matrix:
   fast_finish: true