Updated system test for create using description

--description, -desc, --information, -info, -a
System test for create using time

--time, -t
System test for create using deadline

--deadline, -d
Refactored method feedbackForShow to feedbackForRetrieve
Improved look of show command
 - Will now say it is showing all or, the specific task number.
 - Added details of task when showing only one task.

#48
Added output for Search

#55
Added more details to feedback message for add

#57
Added more details to feedback message for update

#57
Added systest for retrieve
Updated systest for retrieve, added for update
Updated update, added delete

Delete check corner case first and last index
Merge remote-tracking branch 'origin/ui/victor'
Merge remote-tracking branch 'origin/parser/Victor'
Merge branch 'controller/sharon'
Merge remote-tracking branch 'origin/logic/wenhao'
Merge branch 'test/system/sharon'
Used parser
Merge remote-tracking branch 'origin/controller/sharon' into logic/wenhao