Conflict with qtvirtualkeyboard

[gbosiger]

Hello,

Qt has decided to change license from commercial to GPL for the QtVirtualKeyboard* plugin which is now included from the 5.7 version. Installing QtFreeVirtualKeyboard in the Qt install directory destroys everything:

• demo installs in the original keyboard library path and removes it
• name of the IM module qtvirtualkeyboard is now in conflict with the original and it's modules are thus not found

I've forked the project and made needed changes in order to make the installation of the QtFreeVirtualKeyboard less destructive :)

*The way I see it, QtFreeVirtualKeyboard is still interesting because of its license