Use Qt default font instead of hardcoded defaults
Merge branch 'master' of git://github.com/gwaldron/osgearth

Conflicts:
	src/osgEarthQt/MultiViewerWidget
	src/osgEarthQt/MultiViewerWidget.cpp
	tests/feature_geom.earth
Added option to set touch sensitivity
Typo in last commit
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Apply referrer on DBOptions only if referrer is not an empty string
Merge pull request #504 from aurelien35/BugFix_EmptyReferrer

Apply referrer on DBOptions only if referrer is not an empty string
Forgot to set extension in the osgearth_package application.
Merge branch 'master' of https://github.com/gwaldron/osgearth
Atlas: new ExtrudeGeometryFilter work
ResourceCache: cache skins by their URI only for better resource sharing.
Art updates - better looking rooflines
LineSymbol: added stroke-crease-angle for outlining control
Drivers : earth : use findDataFile.

Try to find the earth file in the OSG_FILE_PATH.

Tested with osgviewer against some sample earth files (boston.earth,
openstreetmap.earth, ocean.earth).
Merge pull request #505 from polch/findDataFile

Drivers : earth : use findDataFile.
Art updates.
LevelDBCache: debug messages update
Clean cruft
ShadowCaster: default to 4096 texture size!