Added more to README

Author: rick-r3

README.md

@@ -68,9 +68,14 @@ Important changes
 
 - The library has been extensively profiled for contention issues in a multi-threaded environment.  The only remaining potential
 contention is in `EdDSANamedCurveTable.defineCurve()`, which will be rarely called.
-- The public constant for `Ed25519` has returned as `ED_25519` to avoid repeated lookups in `EdDSAPublicKey.getEncoded()`.
+- The public constant for the curve name has returned as `ED_25519` and the curve specification has a public constant
+`ED_25519_CURVE_SPEC` to avoid repeated lookups when converting to and from encoded form for the public or private keys.
 - `GroupElement` is now completely immutable and all fields final to avoid the need for `synchronized` blocks over mutable fields.
 This required some new constructors and paths to construction.
+- `EdDSAPublicKeySpec.getNegativeA()` and `EdDSAPublicKey.getNegativeA()` now evaluate lazily, taking advantage of the 
+immutability of `GroupElement.negate()` which boosts the performance of the public key constructor when the key is just 
+being passed around rather than used. 
+- Support for X509Key wrapped EdDSA public keys.
 
 ### 0.2.0