Merge pull request #1 from ameen-sarsour/master

add Schema.org & og: & twitter meta tag for thread view
Meta Tags
Modify image preview to crop all images as square
Fix images in threads and thread replies to have a responsive size
Fix Thread View UI for Mozilla
Enhancements on User Profile
Enhancements on User Profile
Fix thread reply watermark
Fix Cancel button in profile page
Arabization of Markdown Editor
New favicon
Fix Thread and Thread Reply UI for Mozilla
Fix Thread and Thread Reply UI for Mozilla
Add thread reply UI
Modal UI
Changes on footer and header
404 Page
404 Page
Enhancemenets on Vote System
Thread Reply UI