[kcalc][kcharselect][kcron] Merged frameworks branch to master, now KF5 based

[Christoph Feck]

Hi,

I just merged the "frameworks" KF5 porting branches of the following 
applications to "master" branch:

- kcalc
- kcharselect
- kcron

These applications will be released as KF5 applications for the KDE 
Applications 15.03 release.

Please check if everything went smooth, and report issues/regressions 
to bugs.kde.org. Also, I have no administrative powers to make the 
required changes to our infrastructures, so if not already done, 
please help with rewiring CI, translations, pko, etc.

Thanks to Lukáš Tinkl and Laurent Montel for help with porting. I am 
still amazed how Laurent manages to find the time while busy with PIM.

Christoph Feck (kdepepo)