[Qt-creator] Dropping Qt Creator compilation with Qt 4

[Ziller Eike]

After a long transitioning period of 3 minor Qt 5 versions, I think that it is time to think about dropping support for compiling Qt Creator with Qt 4.
The point, that it is nicely possible to slowly transition your application from Qt 4 to Qt 5, has been made.
Qt 5 has matured, and the Qt 4 “fallback” should no longer be necessary.
Time to get rid of some ifdefs and simplify code.
Time to actually benefit from new features in Qt 5. (Mime database, new connect syntax, <put your favorite Qt 5 feature here>)

So, the proposal is to drop compilation with Qt4 with Qt Creator 3.3 (current master branch). Qt Creator 3.2 will be the last version of Qt Creator to be compilable with Qt 4.
Of course the Qt version that you can use to build your own applications with, is untouched by that.

Br, Eike

-- 
Eike Ziller, Senior Software Engineer - Digia, Qt
 
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