The delayed pi-round change can now be triggered via a simple api call.
After the api call a timed task will be started, which executes the
necessary steps for a round change. 

Updated copyright year and adjusted header format to be consistent over
all files and with other ARSnova projects.

* Organize imports
* Add missing Override annotations
* Remove trailing whitespace

Variable für Schwellwert zur richtigen Beantwortung einer Planquadratfrage im Backend implementiert.

CouchDBDao und Question-Entity um neue Attribute fuer Toggle Anzahl Markierungen aufheben erweitert.

saveQuestion, update(Question), getAnswers, saveAnswer, getMyAnswer.

With this changeset the spring servlet configuration is separeted from the
application configuration. This will result in a main context and a servlet
context, holding only spring mvc information.

This change has a very nice side effekt: Spring AOP beans will be loaded
only once in application context, not a second time in mvc servlet context.

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

The properties are needed by the client and must not be ignored.

doesnt throw exceptions if fields are not set. remove info output