[+] exception handling in ExchangeRatesVm is simplified
[*] exception messages are fixed
[+] integrations tests are replaced by acceptance tests
[+] da layer exceptions are added
[+] app.config files are replaced with links to web.config
[+] working without db is provided
[+] acceptance test for working without db is added
[+] registreing of appid is moved to Root
[+] viewmodel exceptions are added
[+] ui clean up
[+] comments for ui types are added
[+] comments for bl types are added
[+]  comments for da types and acceptance tests are added
[+] bug fixed