total count of food votes today
Task #4055: getFoodVote is returning a list of given votes
Task #4245: HTTP POST vote for a menu

Task #4027: getQuestionById fixes if a list of answers exist which could
not morphed by self

The new NoContentException should indicate, that there is no error, but
the server could not provide a response object. This will result in
HTTP Code 204 - NO CONTENT => see RFC2616

Fixed two NullPointerExceptions wich might occure in QuestionService or
by using CouchDBDao from QuestionService.

check if session has this question and throw unauthorized exception if
not

add type of user account
adjust test for new user account type
UserServiceTest which test persistence of the maps

Currently, there is an issue with the response. It seems like Spring
is trying to resolve some view, but fails, and then displaying
a message stating POST is not allowed.

This patch uses AbstractController class to add exception handlers
into controllers. These handlers are used to detect some runtime exceptions
which can be thrown in any layer e.g. DAO or service layer.
They recognize NotFoundException and ForbiddenException. Test classes are
able to check if any of these exceptions are thrown during runtime.

If a session was not found in database this will result in http 404,
if the session is not accessable for the current user the request will
result in http 403.

The old behavior was to check for null. This was the response if the
session was not found or the current user could not access this session
(not owner and inactive sessions). Both ended up with http 404 - not found.

Old tests are ignored because they allways fail with unknown reason.
The new tests are very simple and there is a lot of work to be done to
have a fully tested application.