[commhistory-daemon] Fix translation source installation and packaging
[commhistory-daemon] Build with either Qt4 or Qt5

Also includes some adaptation to the qtcontacts-sqlite backend.
[commhistory-daemon] Force the contacts backend selection in qt5

qtpim does not yet support the QTCONTACTS_MANAGER_OVERRIDE mechanism
for selecting the default contacts backend.
Merge pull request #8 from matthewvogt/qt5

[commhistory-daemon] Build with either Qt4 or Qt5
[commhistory-daemon] Undo package and file renaming in Qt5 port

There is no need for commhistory-daemon to be co-installed (which was
slightly broken, anyway), or even for it to build against Qt4 anymore.
Renaming the package and files will only cause trouble.

This can be done without obsoleting the qt5 package, because that was
never tagged and built anywhere.