App/Origin: big refactoring

- Rebase App::Origin on App::DocumentObject
 - Keep all control over the Origin structure inside the Origin and it's
   ViewProvider
 - Add OriginFeature class as common base for App::Plane and App::Line
 - Rebase App::Plane and App::Line on top of newly created class and
   move to the file.
 - Change Origin's ViewProvider API associated with temporary display
 - Lots of associated changes to files
 - Several minor fixes
 - Lots of new bugs

src/Mod/Part/App/Attacher.cpp

@@ -54,8 +54,7 @@
 
 #include "Attacher.h"
 #include <Base/Console.h>
-#include <App/Plane.h>
-#include <App/Line.h>
+#include <App/OriginFeature.h>
 
 using namespace Part;
 using namespace Attacher;
@@ -614,6 +613,7 @@ void AttachEngine::readLinks(const App::PropertyLinkSubList &references,
                 shapes[i] = &(shape->_Shape);
             }
         } else if (  geof->isDerivedFrom(App::Plane::getClassTypeId())  ){
+            // TODO Why this assert is here? (2015-08-31, Fat-Zer)
             assert(sub[i].length()==0);//no more support for "back"/"front" on planes. Use mapReversed instead.
             //obtain Z axis and origin of placement
             Base::Vector3d norm;

src/Mod/Part/App/DatumFeature.cpp

@@ -55,7 +55,6 @@
 # include <Standard_Version.hxx>
 #endif
 
-#include <App/Plane.h>
 #include "DatumFeature.h"
 #include <Base/Tools.h>
 #include <Base/Console.h>

src/Mod/Part/App/Part2DObject.cpp

@@ -46,7 +46,6 @@
 
 #include <Base/Exception.h>
 #include <Base/Reader.h>
-#include <App/Plane.h>
 #include <App/Property.h>
 #include <App/PropertyLinks.h>
 #include "Part2DObject.h"