Current file contains a dummy program which makes use of Google Calendar
APIs to read and write files to the Google Calendar server.

Commented out several unused import statements.

Renamed class to match that of the filename GoogleCalendarManager.java
Changed name of text file, added exit method

Name of text file used to store GoogleCalendarAuthenticationToken changed
from "db.txt" to "GoogleCalAuthenticationToken.txt" to remove ambiguity.

Added an exit method to exit this program.
Changed name from "db.txt" to "GoogleCalAuthenticationToken.txt"

This is to remove ambiguity.
Removed db.txt
Added skeleton methods "add" and "delete".

These two methods are meant to be called by Database.java. Each time the
database adds an event to itself, or removes an event from itself, the
the command will also be sent to GoogleCalendarManager in order for the
updates to take place on the Google Calendar server.
Added unit test: testExecuteRead()

This test actually tests the method which reads the task description from
the task. This test is importnt because it ensures that the correct task
description is read from the task sent to GoogleCalendarManager from
Database, before GoogleCalendarManager adds this task onto the Google
Calendar server.
Added displayTaskDescription method

This method gets the task description from the Task object passed in from
Database.
Added displayTaskDate method.

This method obtains the date from the Task object passed into
GoogleCalendarManager from Database.
Added unit test for testDisplayTaskDate.

This unit test is important because it ensures that the date of the task
passed into GoogleCalendarManager from Database is processed
correctly by GoogleCalendarManager, before it adds the task onto the Google
Calendar servers.
Added unit test: testDisplatTaskTime

This test is important as it ensures that the time of the task passed into
GoogleCalendarManager from Database is read correctly by
GoogleCalendarManager, before GoogleCalendarManager adds this task onto
the Google Calendar online servers.
Added method displayTaskTime

This method returns the time of the task passed into GoogleCalendarManager
from Database.
Merge branch 'wip/GCal'