Merge pull request jupyter#624 from krassowski/fix-links-on-index

Fix links on index

Author: palewire

assets/logos/quantopian.svg

@@ -184,7 +184,7 @@
     - href: https://cocalc.com
       src: cocalc.svg
       alt: CoCalc
-    - href: https://codeneuro.org
+    - href: http://codeneuro.org
       src: codeneuro.svg
       alt: CodeNeuro
     - href: https://www.thedataincubator.com
@@ -223,15 +223,12 @@
     - href: https://www.northwestern.edu
       src: northwestern.svg
       alt: Northwestern University
-    - href: https://www.nyu.edu
+    - href: https://nyu.edu
       src: NYU.svg
       alt: NYU
     - href: https://www.oreilly.com
       src: oreilly.svg
       alt: OReilly
-    - href: https://www.quantopian.com
-      src: quantopian.svg
-      alt: Quantopian
     - href: https://quantstack.net
       src: quantstack.svg
       alt: QuantStack