removed hotfix since undo is properly returning a result
Slight refactoring for ParserImpl
Attempt to clear screen before showing chunks of tasks

#56
Refactored code
Refactored code
Added more details to output of multiple tasks
Update class comments
All required libraries to make google calendar work
Required google information
Method to add to google calendar
Add update method for google calendar
Method to read from google calendar
Added Joda Time Lib
Merge commit '2f9d9ce662cc464ac59933786dcc5b6967d4f264' into JodaTime/Victor
added joda-time library
Merge remote-tracking branch 'origin/ui/victor'
Merge remote-tracking branch 'origin/parser/Victor'
Merge remote-tracking branch 'origin/logic/wenhao'
Merge remote-tracking branch 'origin/db/sean' into logic/wenhao
Merge remote-tracking branch 'origin/JodaTime/Victor' into logic/wenhao