-Things left to do after killing Qt4 (obtained by grepping for Qt4 and 'Qt 4'):
-* look at the FIXME KILLQT4 comments in src/ and resolve them
-* update README
-* update INSTALL
-* update INSTALL.cmake
-* update INSTALL.MacOSX
-* update autoconf
-* update cmake
-* check whether development/autotests/keytest.py really needs QT4
- investigate references to Qt4 in keytest
-* update or remove development/lyx.rpm.README
-* update or remove development/lyxserver/server_monitor.cpp
-* update or remove development/tools/count_total_lines_of_compiled_code.sh
-* check references to qt4 in lib/symbols