rule-of-three

Implements the rule of three: https://en.wikipedia.org/wiki/Rule_of_three_%28C%2B%2B_programming%29

Exceptions

To reduce the amount of warnings, these cases won't emit warnings: - class has a QSharedDataPointer member - class inherits from QSharedData - if only the dtor is implemented and it's protected - class name ends with "Private" and is defined in a .cpp, .cxx or _p.h file

In some cases you're missing methods, in others you have too many methods. You'll have to judge what's the correct fix and beware of binary compatibility.