Added validation for emails and restriction for source code up to 4000 chars
Update bin folder with rake rails:bin:update
Added unicorn gem and unicorn config for devg
Fix real time stdout from bin/run_submission script with cpu resource limit
Enable to create submission
Remove blank model submission spec
fixup responders
Change behavior of check code service
Stream code check
Use config unicorn example for dev mode
Stylize submission new page
Update bg.png
Increase max cpu time limit up to 15s. And use bin/check script to check input source
Update test task descriptiongs