Unzip Mytexts.bau and add files to project
Add empty mimetype file

Change-Id: Icc8099bcc4fe51e12b5314a4f25fcaf5f2e0938b
Reviewed-on: https://gerrit.libreoffice.org/9639Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>