[mkcal] Fix ExtendedCalendar::rawExpandedEvents() to return all events between interval

KDateTime(end, ts).addSecs() was used to set day end. The ctor, however,
creates a date-only instance, for which adding seconds less than a day
is a no-op.
Merge pull request #12 from pvuorela/master

[mkcal] Fix ExtendedCalendar::rawExpandedEvents() to return all events b...
[mkcal] Remove support for Qt4
[mkcal] Remove obsolete debian directory
[mkcal] Remove obsolete CMakeList.txt
Merge pull request #13 from pvuorela/master

Remove Qt4 support, obsolete debian packaging and CMake file
[mkcal] Nuke unused tracker support from orbit.

No idea why this wasn't done earlier, but the net impact is a ~50kb decrease in
post-stripped binary size.
[mkcal] Remove apparently unused DirectoryStorage class.
[mkcal] Remove QtLockedFile solution.

This was all a gigantic lie. It was never really used, but dated back to the start of
the repository. The only "use" of it was in the #include in DirectoryStorage,
which was removed in 6d6ae174fe491aa19462cced8159224dec697313.
Merge pull request #14 from rburchell/master

[mkcal] Nuke unused stuff from orbit.