Update OfflineMapFragment.java

Well, this is another try to fix off-line Maps issue.

My theory for this issue is based in the analisys of the PlanningmapFragment class, mainly at the "update" function called by the PlanningActivity class as soon as we select the Planning screen at the app.

The first thing this function do is clear all map using mMap.clear() and right after it rebuilds the home and waypoints. I couldn't find where the new map is requested again with the function onCreateView(). 

In the option "online maps", the GoogleMap class apparently handle this issue better, showing the map in the layer bellow the markers yet them had been created before map. In the option "off-line maps" I presume which the tiles overlay is put in a layer above the waypoints and somehow are not shown. This can be confirmed when we come back to the Flight Data screen and observes that the waypoints are not shown at map, but if you zoom map you can quickly see them bellow, before the map was updated and overlayed on them.

For this reason I propose clean tiles cache at this class and call maps again in "update" function at the PlanningmapFragment class just after the mMap.clear() calling.

Hope this solve the problem.
First preview of rc split screen view
Simple rc swipe view implementation
For the use of the swipe views, especially for FragmentPagerAdapter, it was neccessary to add the android support library V13, because the FragmentPagerAdapter from support library V4 needs support-fragments and is incompatible with the used nativ-fragments.
This may fix the offline-maps bug in issue #144.
cleaned port/rc.xml
Pulled the activate button from action bar back into layout
This makes the rc fragment more independ, makes the activate button a little more vivid and gives more space in the action bar for a eventually integration of flightModeMenu and wpMenu spinners as in FlightDataActivity
Extend the rc range a little bit
Shrink joystick handle a little to increase move resolution
Added quick mode buttons to rc fragment
Move significant in flight controls to new SuperFlightActivity
To make them easier available in other flight activities like rc screen.
Also refactored the menu structure to move common items to super activities
Extend RCActivity to SuperFlightActivity
Merge branch 'offlinemaps' of https://github.com/arthurbenemann/droidplanner.git
Fixed offlline map issue
Made QuickModeButtons in RCFragment functional and little minor refactoring
Merge branch 'edcd7d5b2df18c3a2a126b673dc85f19911f6ddd' into RCView
Merge branch 'e08f35b3bad4b3d93147a102aac10a6cd71e641c' into RCView
Merge branch 'f58e8c669a98fcc552cc757412e1f01b8e3cafb5' into RCView
Merge branch 'ffc4c2ed8b2465c33e2fc244d2ca5725ce2f08d4' into RCView
Move significant in flight controls to new SuperFlightActivity

To make them easier available in other flight activities like rc screen.
Also refactored the menu structure to move common items to super activities

Merge branch 'fd8a7e2a27795e616ae5e14dd73a8a176efbd5f7' into RCView

Conflicts:
	DroidPlanner/src/com/droidplanner/activitys/FlightDataActivity.java
	DroidPlanner/src/com/droidplanner/activitys/PlanningActivity.java
	DroidPlanner/src/com/droidplanner/activitys/SuperActivity.java
	DroidPlanner/src/com/droidplanner/fragments/FlightMapFragment.java
Extend RCActivity to SuperFlightActivity.
Refactoring some methods from FlightDataActivity to the super Activity.

Merge branch '53ef4a7aab78701dfa75745ad9b5a62b444a0b56' into RCView

Conflicts:
	DroidPlanner/src/com/droidplanner/activitys/FlightDataActivity.java
	DroidPlanner/src/com/droidplanner/activitys/SuperFlightActivity.java