added chat and fixed css
fixed warnings in js code
Modified models, added ChatMessage model
Add chat view and method ffor getting chat messages
Fix typo in playlist.js
added new close button,fixed playstart issue
fixed some minor css bugs
fixed login and register bug
Limit shown chat messages
Fix register to check for existing username
Correctly like and save liked videos for each user
Refactor of main get_playlist_videos to minimize DB interaction and apply correct transaction logic
Improve checking and computing user likes
added liked icons change
Check if user with that email is already present
Bugfix to login view
Bugfix to login view
merged with login fix
fixed stupid mistake issue
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