Resolved issue with rendering XML attributes (keys were not properly removed during encoding)
Resolved issue decoding XML attributes.
Refactored attribute handling for XML decoding.
Updated copyright year.
Added tests for handling specific XML encoding and decoding characteristics.
Updated changlog and readme.
Added documentation on using XML attributes.
Updated changelog to reflect 0.5.0
Merge pull request #4 from morgan/3.3/develop

Release of Dataflow 0.5.0