+ Added Filter, FilterManager, and FilterIndexedData interfaces.
+ Moved all widgets related to filters to src/commands/filters.
+ Added the filters library.
+ Added FilterWindow and one derived window for each filter.
Modified color_get_*() so they do not need "imgtype" parameter.
ColorBar class is public (defined in colbar.h).
Added ColorBar::Fg/BgColorChange signals.
Converted palette editor widget to a C++ class (PalEdit derived from Widget).
Modified the "Palette Editor" (F4 key) to be non-modal (still WIP).
- Added classes: IToolLoop, Tool, ToolGroup, ToolInk, ToolController, ToolPointShape, ToolIntertwine, ToolBox, etc.
- Added ToolLoopManager.
- Removed old src/modules/tools.cpp.
- Added ISettings and UISettingsImpl, adding the tools settings (onion skinning, grid, tiled mode, etc.).
- Added App::PenSizeBeforeChange, PenSizeAfterChange, CurrentToolChange signals.
- Renamed Context::get_bg/fg_color to getBg/FgColor.
- Refactored Brush class to Pen and added PenType.
- Renamed tiled_t to TiledMode.
- get_config_rect now uses the new Rect class imported from Vaca instead of old jrect.
- Added default_skin.xml to load tool icons.
- Added pen preview in Editor::cursor stuff.
- Added Editor::decorators.
Note: This big patch is from some time ago. I did my best to pre-commit other small changes before this big one.
