Added Aronwk and Simon to the readme (#657)

* Added myself and Simon to the readme

Me, since I've started to work on implementing mounts again.
Simon for his work in Reverse engineering the client which has been helping over the years.
Venture Vision and moving platforms/simple movers being two recent things that his RE has helped fix.

moved the special thanks out a header at the suggestion of Xipho and Max, since these people have not directly contributed to the DLU codebase.
made a section under the DLU team recognizing Blaster for the Logo that DLU uses
bumped up the credits header to make formatting make more sense

* Update based on feedback

Credit Blaster builder as they requested.
Remove duplicate entries for under DLU Team as requested

README.md

@@ -417,10 +417,11 @@ Here is a summary of the commands available in-game. All commands are prefixed b
 </tbody>
 </table>
 
-## Credits
+# Credits
 ## Active Contributors
 * [EmosewaMC](https://github.com/EmosewaMC)
 * [Jettford](https://github.com/Jettford)
+* [Aaron K.](https://github.com/aronwk-aaron)
 
 ## DLU Team
 * [DarwinAnim8or](https://github.com/DarwinAnim8or)
@@ -429,10 +430,6 @@ Here is a summary of the commands available in-game. All commands are prefixed b
 * [averysumner](https://github.com/codeshaunted)
 * [Jon002](https://github.com/jaller200)
 * [Jonny](https://github.com/cuzitsjonny)
-* TheMachine
-* Matthew
-* [Raine](https://github.com/Rainebannister)
-* Bricknave
 
 ### Research and tools
 * [lcdr](https://github.com/lcdr)
@@ -444,11 +441,14 @@ Here is a summary of the commands available in-game. All commands are prefixed b
 ### Former contributors
 * TheMachine
 * Matthew
-* Raine
+* [Raine](https://github.com/Rainebannister)
 * Bricknave
 
-### Special thanks
+### Logo
+* Cole Peterson (BlasterBuilder)
+
+## Special thanks
 * humanoid24
 * pwjones1969
-* BlasterBuilder for the logo
+* [Simon](https://github.com/SimonNitzsche)
 * ALL OF THE NETDEVIL AND LEGO TEAMS!