new loginView design.
remove font tag from fxml file.
Add better logging in LoginView.
Add courseView and its controller.
add new abstract method nextView.
fix reconnect bug.
update invigilator pom.xml
Invigilator login page
ViewController override open, close, and error method. No need to override again.
remove useless method.
Merge branch 'Ciel/FixConnector'
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13
creat test view controller

creat test view controller
test view try

test view try
Add getScene method into Director class.
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Merge branch 'master' into HomeView
aaa

aaa
use static stage and scene in Director class.
Merge branch 'master' into HomeView