refactoring util classes into a separate project

MathHubWorker/pom.xml

...n/java/info/kwarc/sally4/mathhubworker/MathHubWorker.java

...info/kwarc/sally4/mathhubworker/MathHubWorkerManager.java

...ava/info/kwarc/sally4/mathhubworker/impl/LMHWorkflow.java

...rc/sally4/mathhubworker/impl/PlanetaryClientWorkflow.java

...ava/info/kwarc/sally4/mathhubworker/model/GetLMHFile.java

...java/info/kwarc/sally4/mathhubworker/routes/LMHRoute.java

...arc/sally4/mathhubworker/routes/PlanetaryClientRoute.java

MathHubWorker/src/main/resources/mathhubworker.xsd

activemq/pom.xml

core/pom.xml

...ain/java/info/kwarc/sally/comm/core/Heartbeatrequest.java

...in/java/info/kwarc/sally/comm/core/Heartbeatresponse.java

...c/main/java/info/kwarc/sally/comm/core/ObjectFactory.java

...rc/main/java/info/kwarc/sally/comm/core/Onsallyframe.java

...ain/java/info/kwarc/sally/comm/core/Registerdocument.java

.../info/kwarc/sally/comm/core/Registerdocumentresponse.java

...rc/main/java/info/kwarc/sally/comm/core/package-info.java

...main/java/info/kwarc/sally4/core/FreeMarkerProcessor.java

.../main/java/info/kwarc/sally4/core/FreeMarkerProvider.java