doc: merge about

wiki/src/doc/about.mdwn

@@ -17,34 +17,8 @@ It helps you to:
 
 **FIXME**: end paste from index
 
-Tails is a live system: a complete operating-system designed to be used from a
-CD or a USB stick independently of the computer's original operating system. It
-is [[Free Software|license]] and based on [[Debian
-GNU/Linux|http://www.debian.org/]].
-
-**FIXME**: begin paste from walkthrough
-
-Tails is a [Free
-Software](http://www.gnu.org/philosophy/free-sw.html)
-[LiveDistro](http://en.wikipedia.org/wiki/Livedistro) based on [Debian
-GNU/Linux](http://www.debian.org/) assisting you to securely and
-anonymously use the Internet almost anywhere you go, e.g. your home,
-work, university, favourite Internet café or local library.
-
-Tails is designed to be used from either a CD or a [USB
-drive](#usb).
-
-Tails has several applications (Web browser, IRC client, Mail
-client, Instant messenger, office suite, image and sound manipulation,
-etc.) pre-configured with security in mind; all outgoing connections
-to the Internet are forced to go through [the Tor
-network](https://www.torproject.org/), whose purpose is to protect
-them against traffic analysis. Moreover, Tails is designed to leave
-no trace on local storage devices unless explicitely asked.
-
-**FIXME**: end paste from walkthrough
-
-Tails comes with several built-in applications pre-configured with security in
+Tails is [[Free Software|license]] and based on [[Debian
+GNU/Linux|http://www.debian.org/]]. It comes with several built-in applications pre-configured with security in
 mind: web browser, instant messaging client, email client, office suite, image
 and sound editor, etc.