add faq page about JACK in general and link it

Author: mseeber

faq/about.md

@@ -0,0 +1,7 @@
+---
+layout: page
+title: "About Jack"
+---
+
+JACK (JACK Audio Connection Kit) refers to an [API](/api) and two
+implementations of this API, jack1 and jack2.

faq/index.md

@@ -6,13 +6,14 @@ menu_item: true
 
 # JACK FAQ
 
+* [What is JACK?](about.html)
 * [What is the difference between JACK1 and JACK2?](https://github.com/jackaudio/jackaudio.github.com/wiki/Q_difference_jack1_jack2)
 * [What audio devices are supported by JACK?](device_support.html)
 * [How do I refer to a soundcard
   so that the name always works?](device_naming.html)
-* How do I stop JACK from creating pops, clicks and other artifacts? 
-* What are the best settings to use? 
-  * What are the best settings to use for a USB1 audio device? 
+* How do I stop JACK from creating pops, clicks and other artifacts?
+* What are the best settings to use?
+  * What are the best settings to use for a USB1 audio device?
 * [How can I use multiple soundcards with JACK?](multiple_devices.html)
 * [How do I use JACK over a network?](netjack.html)
 * [Do I need a realtime kernel
@@ -21,18 +22,18 @@ menu_item: true
   to allow realtime scheduling?](linux_rt_config.html)
 * [How does using Linux with RT_GROUP_SCHED enabled
   affect JACK?](linux_group_sched.html)
-* How can I save/restore JACK connections? 
+* How can I save/restore JACK connections?
 * [How can I setup persistent connections?](persistent_connections.html)
 * [How can I use PulseAudio and JACK
   on the same machine?](pulseaudio_and_jack.html)
-* How can I play audio from .... via JACK? 
+* How can I play audio from .... via JACK?
   * [Flash](routing_flash.html)
   * [GStreamer applications](gstreamer_via_jack.html)
-    (e.g. Totem, Rhythmbox & many more) 
+    (e.g. Totem, Rhythmbox & many more)
   * [Phonon applications](routing_phonon.html)
   * [xmms/audacious](routing_audacious.html)
   * [applications using ALSA directly](routing_alsa.html)
-* How do I connect my ALSA sequencer applications to JACK MIDI? 
+* How do I connect my ALSA sequencer applications to JACK MIDI?
 * [How does JACK compare to ... ?](comparing_jack.html)
 * [Does using JACK add latency?](no_extra_latency.html)
 * [How do I build and install JACK?](build_info.html)