[DF-185] Added assert when trying to start batch after batch already started
[DF-1901] Added command to change value in introspection member
[DF-1519] Fixed distance slider control. Now it emits one signal for all changes.
[DF-185] Set none-type for Variant created without specified type
[DF-1393] Added ability to get camera direction from camerasystem
[DF-1393] Now structure system places newly added entities in front of camera
[DF-1474] Editor start speed improved
[DF-1474] Now introspection members are shown with special class.
[DF-185] Project fixes after folder renamed
[DF-1871] now color works well with allowed values
Merge branch 'development' of https://github.com/dava/dava.framework into development

Conflicts:
	Tools/ResourceEditor/Classes/Qt/DockLODEditor/EditorLODData.cpp
	Tools/ResourceEditor/Classes/Qt/Tools/QtPropertyEditor/QtPropertyData/QtPropertyDataDavaVariant.cpp
	Tools/ResourceEditor/Classes/Qt/Tools/QtPropertyEditor/QtPropertyData/QtPropertyDataInspColl.cpp
Merge branch 'development' of https://github.com/dava/dava.framework into development