Fixed bug regarding parsing of time
Made Parser more tolerant to error. Added new variants to the available commands. added new field to parsedResult-> selectedItem. Edit now updates the selected item field. Able to parse display overdue now.
Made changes to constants
Made feedback msg bigger and more eye catching.
Reformatted detail panel.
Merge pull request #118 from cs2103aug2014-t17-1j/DetailPanelFormat

Detail panel format