Update to 4.2.2

LICENSE-3RD-PARTY.txt

backend/Intro.php

backend/Pianos4.php

backend/TE/AppDB.php

backend/TE/MainFrame.php

backend/TE/TakeExercise.php

css/app.css

css/icons/backend/page.png

css/icons/backend/page_add.png

css/icons/backend/page_delete.png

css/icons/backend/page_edit.png

database/migrations/4.2.2.sql

database/pianos4-te.udb

database/views/resultvex2.sql

doc/shots/all shots.psd.bz2

doc/shots/pianos_tutor_analysis_review.jpg

doc/shots/pianos_tutor_comparison_review.jpg

doc/shots/pianos_tutor_home.jpg

doc/shots/pianos_tutor_review_tools.jpg

doc/shots/pianos_user_analysis.jpg