Add - Thiago A. (@staticdev) to core contributors list

Author: timothycrosley

docs/contributing/4.-acknowledgements.md

@@ -3,6 +3,7 @@ Core Developers
 - Aniruddha Bhattacharjee (@anirudnits)
 - Jon Dufresne (@jdufresne)
 - Tamas Szabo (@sztamas)
+- Thiago A. (@staticdev)
 - Timothy Edmund Crosley (@timothycrosley)
 
 Plugin Writers
@@ -16,7 +17,7 @@ Notable Bug Reporters
 - Bengt Lüers (@Bengt)
 - Chris Adams (@acdha)
 - @OddBloke
-- Martin Geisler (@mgeisler)
+- Martin Geisler (@mgeisleinr)
 - Tim Heap (@timheap)
 - Matěj Nikl (@MatejNikl)