Added nav-bar Template

Merge pull request #33 from DelaMarc/logout_function

Removed the requirements for the logout function in server.py

Merge pull request #30 from zuzaman/master

Added a logout function that clears the user cookies and redirects the user to the login page.

added error message on login.html

redirect user if they try to access pages without being logged in

Merge pull request #1 from YashasG98/master

Fixed background of the modal windows and removed the X button.

Changed README and gitignore

Merge pull request #28 from DelaMarc/bug_correction

Merge pull request #27 from DelaMarc/replace_email_by_profile_name

modified sql requests in PlayerHistory and Leaderboard

replaced email by profile name in MiniGames.html, connect4 and snake games

implemented waiting messages for snake and connect4 games