Update the CREDITS file for AfterShock XE

Author: Irbyz

CREDITS-AfterShock-XE.md

@@ -1,22 +1,23 @@
 # AfterShock XE Credits
 - [**borg**](https://github.com/borg42) - numerous new features,
 improvements and bug fixes
+- [**Davidd (van Deijk)**](https://github.com/dedavidd) - numerous 
+new features, improvements and bug fixes
 - **f:x3r** - `g_reduceMachinegunDamage` implementation
 - [**pbrochart (aka Jack Mesrine)**](https://github.com/pbrochart) -
 damage plums (`g_damagePlums` and `cg_damagePlums`), improvements and
 bug fixes
 - [**miOw**](https://github.com/Irbyz) - mostly copy/paste and removal
 of other people's stuff
-- [**Davidd (van Deijk)**](https://github.com/dedavidd) - numerous 
-bugfixes, improvements and new features 
 
 #### Also the code was taken from the following projects:
 - [**OATMEAL OpenArena mod**](https://github.com/danhetrick/oatmeal) by
 [**Dan Hetrick**](https://github.com/danhetrick) (dhetrick@gmail.com) -
 `g_rocketVelocity`
 - [**(more recent) OpenArena gamecode
-(OAX)**](https://github.com/OpenArena/gamecode) - `g_gravityModifier`
-and GCC-4.8+ compatibility by [**sago007**](https://github.com/sago007)
+(OAX)**](https://github.com/OpenArena/gamecode) - `g_gravityModifier`,
+`g_timestamp`and GCC-4.8+ compatibility by
+[**sago007**](https://github.com/sago007)
 - [**cpm1_dev_docs
 tutorial**](http://games.linuxdude.com/tamaps/archive/cpm1_dev_docs/) -
 CPM ruleset