Translate whatsnew/2.4 (#3312)

Closes #3168

Author: cmaureir

dictionaries/whatsnew_2.4.txt

@@ -27,14 +27,28 @@ Urtubia
 Vasiliev
 Yves
 against
+alacazam
+appendleft
+arbcd
+black
+blue
+cmp
+colormap
 core
+creationflags
+deco
 didn
 differs
+dpkg
 earlier
 either
 euc
 expression
+finder
+followed
 gbk
+getcontext
+ghi
 hkscs
 independent
 iterated
@@ -44,14 +58,34 @@ jisx
 johab
 jp
 kr
+letters
+levelname
+lower
 matched
+most
+newlines
 optional
+popleft
+prec
+recent
 replicate
+require
 returns
 shift
 something
 specified
+sqrt
+startupinfo
+sts
+substitute
 symbolic
+tcsh
+tee
 tested
+transpose
+traps
 whether
 will
+wxy
+xrange
+yellow