Work on razor-lightdm-greeter
Minor fixes on razor-lightdm-greeter
ignored duplicate entries in the HistoryProvider

Currently razorqt-runner can produce duplicates in the history:
if you run the same command from the CustomCommandProvider twice, it
will be inserted into the HistoryProvider-list and the file twice.

This patch checks changes HistoryProvider::AddCommand, so that it will
search if this command already exists and it will move that entry to
the top of the list (instead of creating a new item).
Merge branch 'master' of git://github.com/Boris-de/razor-qt (#556)
Minor fixups
Removed support for liblightdm-qt-1 in razor-lightdm-greeter
merge
Restored some code in razor-lightdm-greeter/loginform.cpp that was erased in a merge
Formatting in razor-lightdm-greeter/loginform.cpp
Set correct event_mask in the RazorTaskButton
Merge remote-tracking branch 'trunk/master' into new-panel-api
The ScreenSaver plugin was ported