blue objects [0.3.0]

This version introduces multiple enhancements:

some modifications for return object as xml and initialize xml data to object

Details of additions/deletions below:
--------------------------------------------------------------

Modified:   /BLUE_FRAMEWORK/packages/Blue/blue_object_class.php
            -- Added --
                _putInitData set initialize data into DATA
                _convertArrayDataToXml convert array DATA value to xml format and return as xml object
                _appendDataToNode append data to node
                _stringToIntegerKey convert string key to integer by removing given prefix
            -- Updated --
                _arrayToXml finished implementation of xml attributes, some code refactoring
                _appendXml added most of implementation to make flat array from xml with attributes
                toXml added root node to store all nodes