Changed polling update to request only updated rounds.

This required adding a version tracking number to the Round class that
increments whenever a field in the Round is changed.
Mirror of changes in master
Merge branch 'master' into NoJavaFX
Merge branch 'master' into NoJavaFX
Merge branch 'master' into NoJavaFX
Merge branch 'master' into NoJavaFX
Merge branch 'master' into NoJavaFX
Merge branch 'master' into NoJavaFX
Possible fix to focus bug (Issue #9)
Possible fix to focus bug (Issue #9)
Fix to dialog focus bug (Issue #9).
Merge branch 'NoJavaFX'

Conflicts:
	src/net/bubbaland/trivia/client/TriviaDialog.java
Fixed bugs with question entry window (Issue #12, Issue #19)

Fixed previous question text not displaying on question conflict dialog.
(Issue #19)
Fixed question overwrite on cancel after canceled conflict dialog.
(Issue #12)
Fixed entered text not appearing after canceling a conflict dialog.