User stats/ profile

[rishabhKalakoti]

Statistics based on the submissions done by user.
Features:

• Submission History
• Accuracy (Correct Attempts/ Total submissions)
• Use calendar/ graph to show the frequency of submissions
  Anything else that comes to mind, please add in comments

[rsvarma95]

Can I work on this ?

[rishabhKalakoti]

Sure @Raul9595 go on.

[Megha-Pathak]

Can I help with this issue?

[rishabhKalakoti]

I think this one is already done in #131 You can take up another one :)