Add examples (issue #5)

This version introduces multiple enhancements:

fix for BlueObject replace data
added some exmaples for Object class

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

Added:      examples/base_object/check_data.php
Added:      examples/base_object/compare_data.php
Added:      examples/base_object/convert_data.php
Added:      examples/base_object/destroy_data.php
Added:      examples/base_object/export_data.php
Added:      examples/base_object/extending.php
Added:      examples/base_object/get_data.php
Added:      examples/base_object/merge_data.php
Added:      examples/base_object/replace_data.php
Added:      examples/base_object/set_data.php

Modified:   examples/header.php
            -- Added --
                added some styles for examples

Modified:   examples/base_object.php
            -- Added --
                loading of example files

Modified:   Base/BlueObject.php
            -- Updated --
                replaceDataArrays set newKeys to empty array