Add more of our awesome contributors

Author: richleland

AUTHORS.md

@@ -2,7 +2,14 @@ php-sparkpost is maintained by Message Systems.
 
 # Contributors
 
-* Jordan Nornhold <[email protected]>, @beardyman
-* Rich Leland <[email protected]>, @richleland
-* Matthew April <[email protected]>
-* James Fellows <[email protected]>
+* Jordan Nornhold, [@beardyman](https://github.com/beardyman)
+* Rich Leland, [@richleland](https://github.com/richleland)
+* Jason Rhodes [@jasonrhodes](https://github.com/jasonrhodes)
+* Matthew April, [@MattApril](https://github.com/MattApril)
+* James Fellows, [@j4m3s](https://github.com/j4m3s)
+* LF Bittencourt, [@lfbittencourt](https://github.com/lfbittencourt)
+* Jakub Piasecki, [@zaporylie](https://github.com/zaporylie)
+* Danil Zakablukovskiy, [@djagya](https://github.com/djagya)
+* Chris Wilson, [@yepher](https://github.com/yepher)
+* Maxim Dzhuliy, [@max-si-m](https://github.com/max-si-m)
+* [@chandon](https://github.com/chandon)