Add reference to the curve API definitions in the README (#6)

Co-authored-by: Pratyush Mishra <pratyushmishra@berkeley.edu>

README.md

@@ -1,6 +1,6 @@
 # Curve implementations
 
-This directory contains implementations of some popular elliptic curves.
+This repository contains implementations of some popular elliptic curves. The curve API implemented here matches the curve traits defined [here](https://github.com/arkworks-rs/algebra/blob/master/ec/src/lib.rs) in the [arkworks-rs/algebra](https://github.com/arkworks-rs/algebra) repository.
 
 ### BLS12-381 and embedded curves
 * [`ark-bls12-381`](bls12-381): Implements the BLS12-381 pairing-friendly curve
@@ -28,4 +28,4 @@ This directory contains implementations of some popular elliptic curves.
 ### MNT-753 cycle of curves and related curves
 * [`ark-mnt4-753`](mnt4-753): Implements the MNT4-753 pairing-friendly curve. This curve forms a pairing-friendly cycle with MNT6-753
 * [`ark-mnt6-753`](mnt6-753): Implements the MNT6-753 pairing-friendly curve. This curve forms a pairing-friendly cycle with MNT4-753
-* [`ark-ed-on-mnt4-753`](ed-on-mnt4-753): Implements a Twisted Edwards curve atop the scalar field of MNT4-753
+* [`ark-ed-on-mnt4-753`](ed-on-mnt4-753): Implements a Twisted Edwards curve atop the scalar field of MNT4-753