Displaying of hyperlink in topics/posts body

As a user I'd like link to website in message content displayed as hyper link automatically, not only if I insert link with 'Insert link' dialog.

Acceptance criteria:

1. Link to website in body of message (in topics, posts, private messages and in preview mode) should be show different color of text.
2. When user hover mouse on a text of link (in topics, posts, private messages and in preview mode), cursor of mouse should be shape of hand.
3. When user click on hyperlink in body of message (in topics, posts, private messages and in preview mode), should open URL of this link.
4. When click on link in messages, and after then click Back, link should be displayed as hyperlink (see conditions from other points in this list).
5. Criteria of automatically displayed link as hyper link, is availability in start of link symbols 'http" or "https". The link should end with a whitespace. Note, that if the link ends on .,!?()[] followed by a whitespace, then these signs should not be considered as a part of the link.
6. The rules for external/internal links should be the same as for [url] bb code. External links should be prefixed with /out?url= part and have no follow attribute.