Cocoa pod missing side bar background image

[Vorgar]

In the SPSideTabBar.m file in the cocoa pod you have:

- (void)commonSetup
{
    UIImage *bgI = [UIImage imageNamed:@"bg-tb"];
    _backgroundPattern = [UIColor colorWithPatternImage:bgI];

    CGRect r = self.frame;
    if (r.size.width > [bgI size].width) {
        r.size.width = [bgI size].width;
        self.frame = r;
    }
}

but there is no bg-tb image as a result the side bar is not shown.

Please, add the background image or even better give an option to set it.