added context sensitive help for observer

...ef/editor/observer/wizard/AbstractObserverWizardPage.java

...tor/observer/wizard/WizardObserverCSwitchCoordinates.java

...rver/wizard/WizardObserverListenOperationByPredicate.java

...ef/editor/observer/wizard/WizardObserverSetAttribute.java

...tor/observer/wizard/WizardObserverSimpleValueDisplay.java

...itor/observer/wizard/WizardObserverSwitchCoordinates.java

...gef/editor/observer/wizard/WizardObserverSwitchImage.java

de.bmotionstudio.help/build.properties

de.bmotionstudio.help/contextDefinitionFile.xml

de.bmotionstudio.help/plugin.xml