added mac meta files to gitignore

Signed-off-by: Peter Menke <pmenke@googlemail.com>
added video and audio files of the utterance example

Signed-off-by: Peter Menke <pmenke@googlemail.com>
Added first corpus description file.

Signed-off-by: Peter Menke <pmenke@googlemail.com>
Merge branch 'master' of https://github.com/sfb673/mexico-testcorpus