Translate whatsnew/3.1 (#3317)

Closes #3171

Author: cmaureir

dictionaries/whatsnew_3.1.txt

@@ -8,13 +8,15 @@ Armin
 Belopolsky
 Bob
 Brandl
+Camelot
 Chu
 Coghlan
 Dalcrin
 Derek
 Diederich
 Eby
 Forgeot
+Gallahad
 Georg
 Guilherme
 Ippolito
@@ -34,13 +36,36 @@ Roger
 Ronacher
 Ross
 Serwy
+Sir
 TestResult
 Vajda
 Vassalotti
+addHandler
+banana
+cbuiltins
 could
+critical
+dept
+desc
+execute
 for
 found
+getLogger
+gimzo
+gizmo
 handlers
 icc
+lp
+mylog
+nL
+nRp
+naL
+natp
+nestablecer
+np
 pickler
+region
+rename
+row
+skipUnless
 ttk