Set Custom Cell Height

Adds ability to update cell height. Example use:

    SWTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    
    if (!cell) {
        NSMutableArray *rightUtilityButtons = [NSMutableArray new];
        
        [rightUtilityButtons sw_addUtilityButtonWithColor:
         [UIColor colorWithRed:0.78f green:0.78f blue:0.8f alpha:1.0]
                                                    title:@"More"];
        
        [rightUtilityButtons sw_addUtilityButtonWithColor:
         [UIColor colorWithRed:1.0f green:0.231f blue:0.188 alpha:1.0f]
                                                    title:@"Delete"];
        
        cell = [[DoNotUseTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier containingTableView:tableView leftUtilityButtons:nil rightUtilityButtons:rightUtilityButtons];
    }
        
        cell = [[DoNotUseTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier containingTableView:tableView leftUtilityButtons:nil rightUtilityButtons:rightUtilityButtons];
    }
    
    // specify custom cell height
    [cell setCellHeight:100.0f];