Ability to provide alternate timing implementation

ChangeLog

diff --git a/ChangeLog b/ChangeLog
index de84df0..3c26b01 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -10,6 +10,7 @@
    * Support for RSASSA-PSS keys and signatures in certificates, CSRs
      and CRLs
    * Single Platform compatilibity layer (for memory / printf / fprintf)
+   * Ability to provide alternate timing implementation
 
 Changes
    * Deprecated the Memory layer