Merge branch 'Asana-option-no-timestamp'

Author: jfromaniello

README.md

@@ -29,12 +29,15 @@ encoded private key for RSA and ECDSA.
 * `audience`
 * `subject`
 * `issuer`
+* `noTimestamp`
 
 If `payload` is not a buffer or a string, it will be coerced into a string
 using `JSON.stringify`.
 
 If any `expiresInMinutes`, `audience`, `subject`, `issuer` are not provided, there is no default. The  jwt generated won't include those properties in the payload.
 
+Generated jwts will include an `iat` claim by default unless `noTimestamp` is specified.
+
 Example
 
 ```js

index.js

@@ -16,7 +16,9 @@ module.exports.sign = function(payload, secretOrPrivateKey, options) {
     });
   }
 
-  payload.iat = Math.floor(Date.now() / 1000);
+  if (!options.noTimestamp) {
+    payload.iat = Math.floor(Date.now() / 1000);
+  }
 
   if (options.expiresInMinutes) {
     var ms = options.expiresInMinutes * 60;