Add object effects layer info

lib/psd/layer/info.coffee

@@ -13,6 +13,7 @@ LAYER_INFO = {
   metadata:               require('../layer_info/metadata.coffee')
   name:                   require('../layer_info/unicode_name.coffee')
   nestedSectionDivider:   require('../layer_info/nested_section_divider.coffee')
+  objectEffects:          require('../layer_info/object_effects.coffee')
   sectionDivider:         require('../layer_info/section_divider.coffee')
   typeTool:               require('../layer_info/typetool.coffee')
 }

lib/psd/layer_info/object_effects.coffee

+LayerInfo = require '../layer_info.coffee'
+Descriptor = require '../descriptor.coffee'
+
+module.exports = class ObjectEffects extends LayerInfo
+  @shouldParse: (key) -> key is 'lfx2'
+
+  parse: ->
+    @file.seek 8, true
+    @data = new Descriptor(@file).parse()