added styling Selection Outline

[rudrakpatra]

Description

Added the following

paper.setting.drawSelected is a boolean, if you want to just select items and dont want to draw the outline, now you can

Styles have new properties,

    /**
     * The width of the selection stroke.
     */
    selectionWidth: number;

    /**
     * The shape to be used at the beginning and end of open {@link Path} items,
     * when they have a selection stroke.
     */
    selectionCap: string;

    /**
     * The shape to be used at the segments and corners of {@link Path} items
     * when they have a selection stroke.
     */
    selectionJoin: string;

    /**
     * The miter limit of the selection stroke.
     */
    selectedMiterLimit: number;

paper.project.currentStyle.selectionWidth = 5.6;