Fixed double escaping of posts' contents on the Profile page.
Fixed some links to the posts' authors on the Profile page were incorrect.
Small fixes on the Feed page.
Now new posts on submit get the "Just now" sign instead of an exact timestamp.
Now posts on the Profile page have the relative timestamp instead of the exact one.
Frames now use lazy loading, may be helpful for the users with slow Internet connection.
Various optimisations on the Profile page.