Porting of the buteo-sync-plugins to qt5 and also to qt5pim. Tested with
memotoo.com and slow-sync and fast sync (both 2-way) works. Also ported
the storage notifier plugin

Signed-off-by: Sateesh Kavuri <sateesh@mobilitas.co>
[qt4] Fix build issues with qt4
[qt5] Update packaging, move plugins to qt5 directories