create Collection class (issue #4)
create Collection class (issue #4)

This version introduces multiple enhancements:

added empty methods to handle some other input formats for collection

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

Modified:   Data/Collection.php
            -- Added --
                appendJson apply given json data as object collection
                appendSimpleXml apply given xml data as object collection
                appendXml apply given xml data as object collection, also handling attributes
                appendIni allow to set ini data into object
                appendCsv allow to set csv data into object
            -- Updated --
                __construct added executing apply all formats

chajr/class-kernel,bluetree-service/data,bluetree-service/collection,bluetree-service/container,chajr/class-kernel