improved submission UI
utilising judge output format to fill table instead of dumping the whole message
updated colour scheme of output and added relative width for smoother display
sorting submissions in problem display ascending inorder to add an index in the table outputted inorder to save first time confusions to which one is the latest submission
sorting contest by end time descending and highlighting ongoing contests
Merge pull request #14 from SunDude/master

improved UI (General)