Support for datatype both in ADQL and VOTable format, datatype property is now editable showing a warning if the inserted value is different from the suggested value

Added connection pooling on core, added ObsCore uytpe and ucd on XML model, added ObsCore optional columns

TAP_SCHEMA on webapp is loaded in an asychronous way to avoid connection timeout issues when loading big TAP_SCHEMA schemas. Refactoring of JavaScript scripts

Added UsersManagement page for admin, added 'UCD Rebuild' functionality based on CDS web services, refactoring, removed ConversationScoped in favour of DeltaSpike WindowScoped, set version number to 1.1.0

Updated ucdvalidator library (Ucidy), changed configuration model in order to support custom UCD values. Set version number to 1.0.4

Bugfix Reload button on new TAP_SCHEMA schemas, UCD dialog improvements, protected TAP_SCHEMA entities from removal, minor changes