Installation in Ubuntu 16.04 - libqt4-core, dev, gui doesn't exist anymore

[Keudeugi]

Hi, title says all.

However that packages(i.e., libqt4-blah) just changed its names as starting with 'libqt', and ends with '4', which should be formed as libqtblah4.

In other words, It would be better to change Qt installation guides from
Qt : sudo apt-get install build-essential g++ libqt4-core libqt4-dev libqt4-gui qt4-doc qt4-designer

to
Qt : sudo apt-get install build-essential g++ libqtcore4 libqtdev4 libqtgui4 qt4-doc qt4-designer

[zdzhaoyong]

Now both Qt4 and Qt5 works now.