Changes

• Added add_selection_style which adds selection style if item is selected
• Added get_default_style which will 100% fill in a style with defaults
• Made get_style guaranteed to fill in all style features.
• Added simple range selection (Keyboard/Mouse)
• Fixed feature changes to redraw correctly
• Added get_row(int x, int y) to find a row from x,y coordinates
• Added get_col(int x, int y) to find a column from x,y coordinates
• Added widget titles as row -3, uses label information
• Fixed bug in redraw when scrollbars appear/dissapear.
• Removed lots of extra code during draw.
• Added a couple of redraw bugs I think :)
• Used fluid 2.0 to generate an exercise program.