Minor README updates. (magenta#467)

* Minor updates to READMEs.

* Add logo

* Fix link

* remove cruft

* remove cruft

README.md

@@ -1,4 +1,4 @@
-<img src="http://magenta.tensorflow.org/assets/magenta-logo.png" height="75">
+<img src="magenta-logo-bg.png" height="75">
 
 **Magenta** is a project from the [Google Brain team](https://research.google.com/teams/brain/)
 that asks: Can we use machine learning to create compelling art and music? If

magenta/demos/NIPS_2016/README.md

@@ -2,9 +2,15 @@
 
 This folder contains download instructions and the source code required to run the call and response demo that won "Best Demo" at NIPS 2016.
 
+You can watch a video of the demo in action on our
+[blog](https://magenta.tensorflow.org/2016/12/16/nips-demo/).
+
 __DISCLAIMER__
 > This demo uses Magenta, Ableton Live, MaxMSP, and Mira. It also only works on OSX. As a fair warning, it will take a bit of familiarity with this software for you to successfully connect all the pieces. It was developed specifically for the NIPS conference and is not designed around easy installation and maintenance.
 
+> If you do not have access to these pieces of software, a
+[simplified version](/magenta/interfaces/midi) of the demo without these
+dependencies is also available.
 
 With those disclaimers aside, many have found the experience of jamming with it to be quite fluid and fun, and we hope you do too. Also, this is _FAR_ from the only way to connect Magenta to a musical workstation, and we encourage you to come up with others and share. We'd love to see and host example interactions with other (and especially free) software such as Supercollider, Pure Data, etc. At the very least, perhaps you can use this demo as an example and launching point for integrating Magenta with your own preferred musical workflow.