Modify(RegistrationDetailsDTO): add messages to NotNull and NotBlank validations; change patterns to take any character count.
Fix(errorHandler.js): delete validation values instead of whole object.
Modify(userform.tpl.html): remove ng-minlength attributes from firm fields.
Modify(transactionInfo.tpl.html): disable refresh button when no account is selected.
Modify(transactionInfo.js): do not update transaction details if there is no account selected.
Add(README.md).