* Now a Cel has a z-index property to change the order of layers per frame
* A new doc::RenderPlan class can calculate the order of cels to be rendered
* z-index is saved as a int16_t in the .aseprite files
* This new field can be set/get from Lua with Cel.zIndex
Several refactoring tasks where made:
- Removed the old Widget::id field (JID).
- Renamed Widget::get/setName to get/setId.
- Moved load_widget_from_xmlfile() to app::load_widget and WidgetLoader
class.
- Removed jhook structure & jwidget_add_hook function. Hooks were replaced
subclassing widgets.
- Added InitThemeEvent class and Widget::onInitTheme member function.
+ Add ButtonBase::Click signal.
+ Button does not close the window by default (you have to configure this action manually when Click signal is triggered).
+ Add "closewindow" attribute to <button> widget in XML files.
+ Move "bevels" to SkinProperty.
+ Convert colorbutton widget in ColorButton C++ class.
