Attribute Definition Processing has been split into 3 parts:
1. processDefinitionAtts which processes all of the XML Attributes assigned on the Definition XML node
2. prcoessDefinitionContents which processes all of the XML children nodes of  the Definition XML node
3. processDefinitionChildNode which will processes a single child of the Definition XML node

This will allow Definition to eventually use Template Blocks

Also refactored Category Processing into a similar pattern:
1. processCategoryAtts - processes all of the XML Attributes on a Attribute/Item Definition  XML Node
2. processOldStyleCategoryNode - processes the content of an old style "Categories" node
3. processItemDefCategoryInfoNode - processes the content of the current style "CategoryInfo" node

Added processItemDefCategoryInfoNode and processDefCategoryInfoNode for processing Category Information
for Item and Attribute Definitions respectively

XmlDocV1Parser refactored the following methods:

* processItemD...