MainActivity menu GUI improved
- hide (replace) scan button, when scanning, with intermediate process icon
- put in dummy for settings and manual debug creation of bottle (maybe not needed)

Naming of bottles
- new bottles get "Unbekannt - " tag to mark, that the bottle is at the moment neither in webservice nor in local database

Webservice
- started to implement webservice communication by modeling skeleton of webservice methods in app functionality of WebserviceHandler