JBEHAVE-966:  Added use of JFrameContextView in CoreStories.

Conflicts:
	examples/core/src/main/java/org/jbehave/examples/core/CoreStories.java
JBEHAVE-966:  Moved classes to separate context package.  Added context story reporter and format to allow the setting of the current scenario.  Updated CoreStories example configuration.

Conflicts:
	examples/core/src/main/java/org/jbehave/examples/core/CoreStories.java