add all tree-based build logic to CategoryTree
Add detailed block comments to methods in CategoryTree
#44 Add detailed block comments to methods in CategoryTree
use CategoryTree for loading in CRData
Add getUrl to Product
Add getUrl to Product #44
ScoredAttribute now has a correlation score
Doesn't ask for correlation on non numeric attribtues.
cleanup code
merge master into Issue044
Collapse Ratings and Specifications into Attributes
collapsed Specs and Ratings application-wide (before was only within Product implementation)
implement AttributeType as an enum inside Attribute.  Add new static factory methods buildRating, buildSpecification, buildPrice).
Implemented price as an attribute.  Use Preduct.isPriced() and Product.getPrice()
deprecated un used attributes and methods
Merge branch 'Integration' of https://github.com/prmr/Creco.git into Integration
#60 Solve UI performance issue by changing loading order
#43 Product Link implemented
#43 Empty link problem solved
ddddddddd