undefined method `parse_zip!'

[tomashanacek]

/Users/tomashanacek/Documents/projects/psd.rb/lib/psd/channel_image.rb:90:in `parse_image_data!': undefined method `parse_zip!' for #<PSD::ChannelImage:0x007f9c45a05f58> (NoMethodError)
    from /Users/tomashanacek/Documents/projects/psd.rb/lib/psd/channel_image.rb:63:in `block in parse'
    from /Users/tomashanacek/Documents/projects/psd.rb/lib/psd/channel_image.rb:42:in `each'
    from /Users/tomashanacek/Documents/projects/psd.rb/lib/psd/channel_image.rb:42:in `parse'
    from /Users/tomashanacek/Documents/projects/psd.rb/lib/psd/lazy_execute.rb:58:in `load!'
    from /Users/tomashanacek/Documents/projects/psd.rb/lib/psd/lazy_execute.rb:39:in `method_missing'
    from /Users/tomashanacek/Documents/projects/psd.rb/lib/psd/renderer/canvas.rb:13:in `initialize'
    from /Users/tomashanacek/Documents/projects/psd.rb/lib/psd/renderer/canvas_management.rb:10:in `new'
    from /Users/tomashanacek/Documents/projects/psd.rb/lib/psd/renderer/canvas_management.rb:10:in `create_group_canvas'
    from /Users/tomashanacek/Documents/projects/psd.rb/lib/psd/renderer.rb:27:in `render!'
    from /Users/tomashanacek/Documents/projects/psd.rb/lib/psd/renderer.rb:66:in `to_png'
    from /Users/tomashanacek/Documents/projects/psd.rb/lib/psd/nodes/build_preview.rb:9:in `to_png'
    from /Users/tomashanacek/Documents/projects/psd.rb/lib/psd/nodes/build_preview.rb:13:in `save_as_png'

[meltingice]

Any chance you could share the PSD that caused this error? ZIP image decompression hasn't been implemented mainly because I haven't been able to produce a PSD that actually uses it.

[tomashanacek]

psd in issue #70