[RELEASE] Release of TYPO3 6.2.2

Change-Id: Id59a7279b29d882221d8afa1f582c5c1ff791d33
Reviewed-on: https://review.typo3.org/29910
Reviewed-by: TYPO3 Release Team
Tested-by: TYPO3 Release Team
[TASK] Set TYPO3 version to 6.2.3-dev

Change-Id: I14eab875e340e6d779b4f224de9cc801d84559d1
Reviewed-on: https://review.typo3.org/29911
Reviewed-by: TYPO3 Release Team
Tested-by: TYPO3 Release Team
[TASK] Add PHP 5.6 as travis-ci environment

travis-ci already provides a PHP 5.6 beta build.
It currently executes unit, functional and linting successfully
and is added to the list of standard environments for now.

Change-Id: Ibde2364564afe18f602f75174b779527b55c25bc
Reviewed-on: https://review.typo3.org/29913
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
[BUGFIX] LocalizationUtility methods should be static

All public methods of LocalizationUtility are static, but two
protected methods are not. Make those static, too.

Change-Id: I267805cad3f008f24e053f69670fac0f805f7ad2
Resolves: #58600
Releases: 6.2
Reviewed-on: https://review.typo3.org/29921
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
Reviewed-by: Markus Klein
Tested-by: Markus Klein
Merge remote-tracking branch 'upstream/master'