#102 master - encoder for AuthorityURL/Identifier/advertised (GS>=2.2)
#102 master - specific encoders in GSLayer for GS=2.1
#102-AuthorityURL/Identifier/advertised decoders +fix/add other methods
#102 master update RESTLayer javadoc
#102 master - fix GSLayerEncoder21Test
#102 master - improve GSLayerEncoder21 tests
#102 master - add decoders for GS 2.1 + tests
#102 - make tests based on GeoserverRESTTest VERSION
#106 master - fix tests to use GSVersionEncoder
#102 master - fix tests
Merge pull request #104 from eblondel/master-102-GSLayer-authorityURL-identifier-advertise

# 102 - add Layer encoder/decoders for AuthorityURL / Identifier + advertised property