Revision control
++ TEMPLATE = subdirs
++ SUBDIRS = 1_readonly \
++ 2_formatting \
++ 3_changingmodel \
++ 4_headers \
++ 5_edit \
++ 6_treeview \
++ 7_selections
++
++ # install
++ target.path = $$[QT_INSTALL_EXAMPLES]/widgets/tutorials/modelview
++ INSTALLS += target