added IEkb, refactored i18n management, adopted standard prefixes

- upgraded to v0.2.0-SNAPSHOT
- added IEkb
- refactored i18n, now always returning INLString with default locales
- added createAttribute  to IEntityService
- now using "xsd" prefix for primitive types and "oe" for complex ones
- appended 'Service' to IProvenance, ISearch