Modify(errorHandler.js): make validation errors an object, not an array and fill it with fields and values instead of with objects.

Add(deposit.spec.js).
Modify(deposit.js): add module dependencies for errorHandler and eventMap; implement handling of validation error events.
Modify(deposit.js): remove .error from makeDeposit function.
Modify(deposit.tpl.html): add form group for displaying validation errors.
Modify(ErrorInterceptor): reply with list of one validationInfoDTO instead of the plain object.
Modify(deposit.js): reset validation message on calling makeDeposit function; reset isProcessing flag on .error.

Add(withdraw.spec.js).
Modify(withdraw.js): add module dependencies for errorHandler and eventMap; add scope variable 'validationMessage'; implement handling of validation error event.
Modify(withdraw.tpl.html): add help-block for displaying validationMessage.
Modify(userForm.js): add module dependency for errorHandler; add scope property 'errors' pointing to received validation errors; remove unused function 'validateField' from factory 'formErrors'.
Modify(userform.tpl.html): insert help-blocks for validation error messages from server.

Modify(register.js): remove unused formErrors parameter from RegisterCtrl.
Modify(userform.tpl.html): remove angular validation messages from username and password fields.
Modify(errorHandler.js): implement clearing of received error messages on new request.