Update to C++11/C++14/Qt5.4 whereever possible

[hellerve]

A short(possibly incomplete) To-Do-List:

• Use Smart Pointers in Application
• Use Smart Pointers in Test Suite
• Use const more appropriately
• Use auto where appropriate
• Change QtOpenGL interface to Qt5.4 specifications

This is a rather long process, but I assume it will be worth it.

[hellerve]

I played around with C++14 and Qt5.4 a bit today and was able to verify that the code works as expected with it. Now it just has to exploit all the cool new features.