* *.tcl:         Bumped the version number to 5.12.
	* COPYRIGHT.txt:
	* README.txt:

	* CHANGES.txt: Updated to reflect the changes.

	* scripts/*.tcl: Added the "-customdragsource" and "-showseparators"
	  configuration options; added the "showtargetmark", "hidetargetmark",
	  "targetmarkpos", and "targetmarkpath" subcommands; made the default
	  binding scripts drag-friendly; new values "flat5x3" and "flat5x4" for
	  the "-arrowstyle" option; updated the tree styles "adwaita",
	  "ubuntu", and "mint"; fixed a bug related to horizontal scrolling in
	  an empty tablelist widget with positive "-titlecolumns" value.

	* scripts/tclIndex: Newly generated.

	* ../../examples/*.tcl: Bumped the version number to 5.12.

	* doc/*.html: Updated to reflect the changes; added a "Drag & Drop
	  Support" section to the reference manual.

	* doc/*.png: Updated several screenshots.
	* *.tcl:         Bumped the version number to 5.12.
	* COPYRIGHT.txt:
	* README.txt:
	* CHANGES.txt: Updated to reflect the changes.
	* scripts/*.tcl: Added the "-customdragsource" and "-showseparators"
	  configuration options; added the "showtargetmark", "hidetargetmark",
	  "targetmarkpos", and "targetmarkpath" subcommands; made the default
	  binding scripts drag-friendly; new values "flat5x3" and "flat5x4" for
	  the "-arrowstyle" option; updated the tree styles "adwaita",
	  "ubuntu", and "mint"; fixed a bug related to horizontal scrolling in
	  an empty tablelist widget with positive "-titlecolumns" value.
	* scripts/tclIndex: Newly generated.
	* doc/*.html: Updated to reflect the changes; added a "Drag & Drop
	  Support" section to the reference manual.
	* doc/*.png: Updated several screenshots.
	* ../../examples/*.tcl: Bumped the version number to 5.12.