Clases del modelo y primeras funciones
Reorganización de las clases para el nuevo esquema.

--HG--
rename : src/es/icane/metadatos/Cliente.java => src/es/icane/metadatos/MetadataClient.java
rename : src/es/icane/metadatos/DateAdapter.java => src/es/icane/metadatos/adapters/DateAdapter.java
rename : src/es/icane/metadatos/modelo/AreaTematica.java => src/es/icane/metadatos/model/Category.java
rename : src/es/icane/metadatos/modelo/ProductorFuente.java => src/es/icane/metadatos/model/DataProvider.java
rename : src/es/icane/metadatos/modelo/Estadistica.java => src/es/icane/metadatos/model/DataSet.java
rename : src/es/icane/metadatos/modelo/Periodicidad.java => src/es/icane/metadatos/model/Periodicity.java
rename : src/es/icane/metadatos/modelo/AmbitoTerritorial.java => src/es/icane/metadatos/model/ReferenceArea.java
rename : src/es/icane/metadatos/modelo/AreaTematica.java => src/es/icane/metadatos/model/Section.java
rename : src/es/icane/metadatos/modelo/Fuente.java => src/es/icane/metadatos/model/Source.java
rename : src/es/icane/metadatos/modelo/AreaTematica.java => src/es/icane/metadatos/model/Subsection.java
rename : src/es/icane/metadatos/modelo/Nodo.java => src/es/icane/metadatos/model/TimeSeries.java
Sync model and requests to API changes.

--HG--
rename : src/es/icane/metadatos/SectionNotFoundException.java => src/es/icane/metadatos/CategoryNotFoundException.java
rename : src/es/icane/metadatos/SectionNotFoundException.java => src/es/icane/metadatos/DataSetNotFoundException.java
rename : src/es/icane/metadatos/SectionNotFoundException.java => src/es/icane/metadatos/ReferenceAreaNotFoundException.java
Added uriTag for periodicity.
Added URI for Section and Subsection.

--HG--
rename : src/es/icane/metadatos/SectionNotFoundException.java => src/es/icane/metadatos/SubsectionNotFoundException.java
Add label to sources.
Add apiUris for TimeSeries.
Update core libraries.
Delete old libraries.
Centralize default media type.
Remove apiUriMap and related methods (doesn't work).
Fix initial and final periods' element's names.
Mark ApiUri as Serializable.
Added new fields to TimeSeries and new class Measure in order to map the new version of the API. Added new method with param inactive, which allows metadata retrieving of inactive time series in stable-testing environment.

--HG--
rename : src/es/icane/metadatos/model/Link.java => src/es/icane/metadatos/model/Measure.java
Add new method for uriTag-only access to time series
Fix getTimeSeriesByCategory.
Fix getTimeSeriesByCategory's javadoc.
Adapt Measure to final API model
Correct typo in "measure" element name for TimeSeries
Add new method for getting a time series list by category, section and subsection uri tags.