[TASK] NEWS.txt thanks to all contributors for merge number 10.000

Change-Id: Iac334745b537a15af9291cd05917a38a9e4eaf95
Releases: 6.1
Reviewed-on: https://review.typo3.org/19688
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
Reviewed-by: Felix Kopp
Tested-by: Felix Kopp
Reviewed-by: Philipp Gampe
Tested-by: Philipp Gampe
Reviewed-by: Magdalena Leichsenring
Tested-by: Magdalena Leichsenring
Reviewed-by: Alexander Opitz
Tested-by: Alexander Opitz
Reviewed-by: Benjamin Mack
Tested-by: Benjamin Mack
Reviewed-by: Nicole Cordes
Tested-by: Nicole Cordes
Reviewed-by: Steffen Ritter
Tested-by: Steffen Ritter

NEWS.txt

@@ -14,6 +14,9 @@ http://wiki.typo3.org/TYPO3_6.1
 Compatibility
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+During 6.1 development phase the 10.000th core merge was done.
+Inspiring people to share - special thanks to all contributors!
+
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 System environment
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