Implemented logging methods in Classroom.java. 
Added new ConsoleHandler to logger and disabled parent loggers for the
logger. 
Fixed logger not displaying "FINE" level logs even when verbose is
enabled.
Console verbose is now dependent on the properties file's setting.
Added multiple verbose logs to Classroom.java, PropertiesHandler.java,
and Workbench.java.
Implemented a WindowListener in Workbench for proper disposal when
closed.