set version 0.6.0
remove gwt stuff
update tests
Refactoring for version 0.6.0

- deleted JSONLoad and JSONSave
- EObjectMapper class replaces JSONLoad and JSONSave
- moved package *.internal to *.streams
- added package map
- map package contains serializer and deserializer
- moved JsUtil to map package
Update tests
Added support for namespace serialization.
code cleaning