update DESCRIPTION
refactor S4 Dataset model
Merge branch 'master' of https://github.com/opensdmx/rsdmx
master #24 getNamespaces
master #24 findNamespace function
master #24 adding tests
master #23 start testing
master #25 separate classes for generic and compact data
master #25 update doc
master #26 add MessageGroupType and related S4 class
master #23 prepare S4 encapsulation for Structure types
formatting code
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Merge branch 'master' of https://github.com/opensdmx/rsdmx into generic_parse

Conflicts:
	DESCRIPTION