updating the project to make use of the V4 support library in order to improve backward compatibility.
updated the droidplanner project to make use of the support library.
propagated necessary changes, and exported SettingsFragment to a different activity since it's not yet supported by the support library.
fixed fragments handling bugs.
merged with latest from upstream/master.
fixed remaining issues with switch to the support library.
updated remaining fragments to the v4 support library.
updating submodules with latest from upstream/master.
Submoldules: Updating submodules with latest from upstream/master.

HorizontalListView Demo was using a old version of the support library, it didn't caused problems for droidplanner. But this removes an ugly warning at the console.
Merge branch 'master' into feature_improving_backward_compatibility

Conflicts:
	DroidPlanner/res/menu/menu_newui_connected.xml
	DroidPlanner/res/menu/menu_newui_disconnected.xml
	DroidPlanner/src/com/droidplanner/activitys/ConfigurationActivity.java
	DroidPlanner/src/com/droidplanner/activitys/helpers/SuperActivity.java
Merge pull request #557 from arthurbenemann/feature_improving_backward_compatibility

Feature improving backward compatibility