Fixes needed to make ubuntu build work again (at least for me)

README

@@ -49,13 +49,14 @@ To build on Linux:
 
 sudo apt-get install phonon libqt4-dev \
  libphonon-dev libphonon4 phonon-backend-gstreamer \
-qtcreator libsdl1.2-dev libflite1 flite1-dev build-essential
+ qtcreator libsdl1.2-dev libflite1 flite1-dev build-essential \
+ libopenscenegraph-dev
 
 cd directory
 
 git clone https://github.com/mavlink/qgroundcontrol.git
 
-go to thirdParty -> libxbee 
+go to libs/thirdParty -> libxbee 
 
 Create Library -> Readme file in folder
 

qgroundcontrol.pro

@@ -657,3 +657,5 @@ win32-msvc2008|win32-msvc2010 {
     INCLUDEPATH += libs/thirdParty/3DMouse/win
     DEFINES += MOUSE_ENABLED_WIN
 }
+
+unix:!macx:!symbian: LIBS += -losg