New plugins: color tools

[tkbd]

hello edb
I love this tool.
Then, I found two issues and good things through Palette tools test.

Good things

• Palette Tools could import GIMP Palettes file(gpl) and Adobe color books file(acb).
  
• The tools also could export with color list by column ,it is compatible to gpl file.
  (gpl palette file often used by GIMP and Inkscape.)
  
• I use often use Import From swatch Image(png,tif)----Get each corlors from widly filled pixel area in the color grid image.
  

Unsatisfied point
New Color tool palette can trim for new created colors, but can't eliminate specific one color.


Issue 1.Some aco(Photoshop swatch) files can't load colors (no message in log window)
Issue occurred = HKS E-Z Process.aco , HKS E-Z.aco,ANPA Colors.aco,etc
No problem = VisiBone.aco , Windows.aco, Mac OS.aco,WebSafeColors.aco


Issue 2.Cant export color palette completely by SVG(EPS) format
Wings crash log output when exporting through Palette tools the color palette that has some gaps with undefine color(s) in wings3d-built-in palette window.(It is workaround that used compact command for fix gap.)
The SVG file generate,but it is incompletely.
It's a good to skip datas with undefined colors(It is a slashed swatch in palette window).


It is as like color ,color,... (omit)... color , none,none ,color,none ....
The output log is a following.

Code:

wpc_palette_imports: Error function_clause stack trace: [{wpc_palette_imports,
        export_swimg_svg_1,
        [<0.111.0>,
         [none,none,
          {0.8627450980392157,
           1.0,
           0.8627450980392157}],
         39],
        [{file,
          "src/wpc_palette_imports.erl"},
         {line,1087}]},
       {wpc_palette_imports,
        export_swimg_svg,2,
        [{file,
          "src/wpc_palette_imports.erl"},
         {line,1084}]},
       {wpc_palette_imports,
        '-do_export_swimg_svg/2-fun-0-',
        2,
        [{file,
          "src/wpc_palette_imports.erl"},
         {line,961}]},
       {wings_file,
        '-export_filename_1/2-fun-0-',
        3,
        [{file,
          "wings_file.erl"},
         {line,97}]},
       {wings_develop,
        time_command,2,
        [{file,
          "wings_develop.erl"},
         {line,87}]},
       {wings_plugin,
        command,3,
        [{file,
          "wings_plugin.erl"},
         {line,168}]},
       {wings,
        raw_command_1,3,
        [{file,"wings.erl"},
         {line,646}]},
       {wings,raw_command,
        4,
        [{file,"wings.erl"},
         {line,643}]},
       {wings_wm,
        handle_event,3,
        [{file,
          "wings_wm.erl"},
         {line,1039}]},
       {wings_wm,
        send_event,2,
        [{file,
          "wings_wm.erl"},
         {line,1005}]},
       {wings_wm,
        do_dispatch,2,
        [{file,
          "wings_wm.erl"},
         {line,897}]},
       {wings_wm,
        get_and_dispatch,0,
        [{file,
          "wings_wm.erl"},
         {line,692}]},
       {wings,init_part2,3,
        [{file,"wings.erl"},
         {line,108}]},
       {proc_lib,
        init_p_do_apply,3,
        [{file,
          "proc_lib.erl"},
         {line,226}]}]