- G-Pen algorithm is ported into GIMP trunk. Now smoothing function works for Ink and Brush tools.
Initial import of color blending function for smudge tool.
 - Add blending function for smudge tool
 - Add "Blend" dynamics output.
 - Fix "shade_pixels" and "shade_regions" functions to work correctly.
 - Add brush dynamic transform feature for smudge tool.
Add toolbar for tool-options to GimpImageWindow.
- "gimp-tool-options-gui-horizontal-func" property is imported into the GimpToolInfo.
- "gimp-tool-options-gui-horizontal" property is imported into the GimpToolInfo.
- gimp_tools_register function has one more parameter. (options_gui_horizontal_func)
- GimpToolOptionsToolbar class is created.
- GUI parts in toolbar is created by "gimp-tool-options-gui-horizontal-func".
GimpToolOptionsToolbar class is newly imported.
* Some parameters in the toolbar can be edited using popup editor.
* GimpDock:  GIMP dock column folding is implemented.
* GimpPopup/GimpPopupButton: Nested popup from popup menu is supported.
*Clean up code.
*Show description on the title bar of the dock.
* Reimmported code.
* Implement tool options toolbar for eraser tool.
* Bugfix: free GimpDynamics#blending_output when Dynamics is disposed.
* Bugfix: add NULL pointer check code at gimp_dock_titlebar_button_clicked.
* Implement Brush Editing popup view (app/tools/gimpbrushoptions-gui.{c,h})
* Bugfix:gimpsmudge.c: Update max_radius only in gimp_smudge_start function.
* gimpsmudge.c: comment out debug code.
* Bugfix:gimpbrushoptions-gui.c: Make sure to disconnect some signal handlers on widget destruction.
* Add brush edit option to toolbar brush popup.
* Implement toolbar popup for paint dynamics.
*Bug fix: clean up destroy event handlers.
Merge remote branch 'local-master/gui-enhancement' into gui-enhancement

Conflicts:
	app/tools/gimppaintoptions-gui.c
	app/tools/gimptooloptions-gui.c
	app/tools/gimptooloptions-gui.h
	app/widgets/gimpdock.c
	app/widgets/gimppopupbutton.c
	app/widgets/gimppopupbutton.h
* Enable automatic tab style update when tab position is vertical.
* Implement popup palette color selector for GimpFgBgEditor.