Update LICENSE

LICENSE

@@ -19,3 +19,19 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
+
+
+____________________________________________________________________________
+
+Copyright / attribution information for additional sound files used by this project:
+
+convolution reverb file '/dep/base/convReverb.mp3':
+Impulse response from Lady Chapel, St. Albans Cathedral by Marcin Gorzel, Gavin Kearney, Aglaia Foteinou, Sorrel Hoare, Simon Shelley, Audiolab, University of York, www.openairlib.net
+
+common password notification sound file '/dep/base/commonPWNotification.mp3':
+by Rogan McDougald, Creative Commons - Attribution license, https://freesound.org/people/RoganMcDougald/sounds/260434/
+
+encrypted transmission sound file '/dep/encryptedTransmission/encryptedTransmission.mp3':
+Space Shuttle final approach radio transmission from NASA (public domain, available at Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Space_shuttle_columbia_final_approach_20030201.ogg )
+
+