v2.4

Add 104 new icons
20 categories, 1346 icons.
Newicons:align_bottom,align_horizontal_center,align_left_2,align_right_2,align_top,align_vertical_center,border_blank,border_bottom,border_horizontal,border_inner,border_left,border_outer,border_radius,border_top,border_vertical,columns_2,columns_3,copy_2,copy_3,distribute_spacing_horizontal,distribute_spacing_vertical,dot_grid,edit,external_link,home_6,layout_2,layout_3,layout_4,layout_5,layout_6,layout_7,layout_8,layout_9,layout_10,layout_11,layout_bottom,layout_grid,layout_left,layout_right,layout_top,performance,pin_2,rows_2,rows_3,rows_4,sale,search_2,search_3,store_2,switch,table_2,toggle_left_2,toggle_left,toggle_right_2,toggle_right