complete static pages
- schedule
- terms and conditions
this is working set of contest function.
make code to create contest.
- server side basic functionality complete.
- client side basic expression complete.
- TODO:
  - update server side error handling.
  - update client side error handling.
  - seperate contest list template.
  - make clean template design.
make full set of contest
- contest(s)
- contest problem(s)
- problem's input/output pair(s)
bugfix db models.py
- app_label shoul be a name of app.
- sensitive about letter case.
make new models.
update dashboard design.
complete basic functionalities
- download random data set
- upload compitition's output
- update score
complete basic functions.