Summary of changes.

	Navigating groups with PgUp/Dwn	Lines/Circles/Arcs items are named & can be renamed (Shortcut F2)	Constraints uses named items	Option for speeding up rendering (disable bad constraint suggestions)	The include file can now be changed via the command window	Fixed rendering when saving.	Enabled deletion of the active group	Initial work on 3D scaling. Scale import files by x,y,z factor. Saved with file

Signed-off-by: thorsenrune <thorsenrune1@gmail.com>