Implemented DefaultUserLanguageService, cleanup usage of Woozle Session ref #47
Merge branch 'master' of https://github.com/woozles/woozle-core
Renamed AbstractService to MandatorAuthenticatedService, implemented PublicService which provides functionaliy for services which can be used without authentication. ref #47
Added [DataMember] attribute to SessionData variable on Session, Save Session when changing session data. ref #47
Introduced WoozleDefaults which can be set during Host setup and are taken as defaults for the session creation of a not yet authenticated user. ref #47
Revoked differntiation between PublicService and MandatorAuthenticatedService. The needed defaults such as Language or mandator will be set in session initialization now, so only an AbstractService to provide the Session is needed now. ref #47