Extended ImageRenderer to accept wxImages through params
Replaced wxBitmap with wxImage for button icons
Added const qualifier to listener parameters
Updated demo
Reimplemented DragHandler to use the new listener mechanism
Updated ImageRepository header
Changed DrawImageInstruction implementation and removed boost::optional
Updated FrameHeader action buttons to use icons
Fixed PNG loader error
Added StyledTextBox implementation
Added Insets class
Updated Style class interface
Added Insets to Style
Updated StyledLabel default renderer to use the label style.
Implemented XML style sheets and added categories to styles
Added align function
Removed old documentation fragments
Updated documentation
Bulk update
Updated gitignore