Log Message:
Update typo3 package to 4.5.6.

Due to several security issues found in the TYPO3 Core, there was a
combined release of TYPO3 4.3.14, 4.4.11 and 4.5.6.

Find more details in the security bulletins:
http://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2011-002/
http://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2011-003/

Release Notes: http://wiki.typo3.org/wiki/TYPO3_4.5.6