* use pass by ref instead of by value if possible * use reference in interation over collections * fix no tag inserting
QVersionNumber has been introduced since Qt-5.6 and it is better to use it instead of custom version checking
Move old chechUpdates() method to this class. Create ability to show ChangeLog after updates (by using global config with version). Changelog (only for the latest version) will be written to version.h during cmake run.