Fixed bug in ConvertToDateTransformer which caused number-only date
masks like "ddMMyyyy" to be ignored.
Issue #23: Initial design of metadata layer interfaces and example
LocalizedName annotation type.
Added license headers
Added immutable Impl classes of the metadata layer.
Added preliminary XSD for metadata definitions, an example XML file for
it and a ForeignKey annotation type.
Updated example XML file
Updated license headers
Merge pull request #24 from datacleaner/metadata_layer

Metadata layer