Clarify the relation to ox-arrays and orthotope

Author: Mikolaj

CREDITS.md

@@ -10,9 +10,11 @@ Faustyna Krawiec, Neel Krishnaswami, Tom Ellis, Andrew Fitzgibbon, Richard Eisen
 
 Oleg Grenrus, whose https://hackage.haskell.org/package/overloaded contains inspiring examples related to AD
 
-Edward Kmett, author of the archetype Haskell https://github.com/ekmett/ad library
+Edward Kmett, author of the archetype Haskell https://hackage.haskell.org/package/ad library
 
-Justin Le, author of the https://github.com/mstksg/backprop library and the amazing articles at https://blog.jle.im
+Justin Le, author of the https://hackage.haskell.org/package/backprop library and the amazing articles at https://blog.jle.im
+
+Lennart Augustsson, author of the incredibly clever shapely typed Haskell tensor library https://hackage.haskell.org/package/orthotope
 
 Tom Smeding, who influenced the major implementation decisions of horde-ad and solved the hardest technical problems
 

README.md

@@ -199,10 +199,10 @@ in file `MnistCnnShaped2.hs` and the directory contains several other sample neu
 Compilation from source
 -----------------------
 
-Our library is inspired by and crucially depends in its performance
-on [ox-arrays](https://hackage.haskell.org/package/ox-arrays)
-and [orthotope](https://hackage.haskell.org/package/orthotope),
-which don't require any special installation.
+Horde-ad uses [ox-arrays](https://hackage.haskell.org/package/ox-arrays)
+as its CPU backend library, which in turn is inspired by and depends
+on [orthotope](https://hackage.haskell.org/package/orthotope).
+Neither of these packages require any special installation.
 Some of the other
 [Haskell packages we depend on](https://github.com/Mikolaj/horde-ad/blob/master/horde-ad.cabal)
 need their usual C library dependencies to be installed manually,