Datatip: added datatipManagerMode

+ datatipManagerMode() -> toggle on cur fig.
                    (figurehandle) -> toggle on figure.
                    (%t|f) enable/disable on cur. fig.
                    (fig, %t|f) enable/disable on fig.

+Improved datatip code.

+Fix: datatipRemoveAll, datatipSetOrienattion

+Added: tip_interp_mode property.

+Removed useless files.

+Prepare code to add displayFunction

Change-Id: Ib69d9ec19ddcb60c7c49dcad46c6165b94b25471