Inital patches
Replaced t3lib_extMgm by \TYPO3\CMS\Core\Utility\ExtensionManagementUtility
Replaced t3lib_div with \TYPO3\CMS\Core\Utility\GeneralUtility
Replaced t3lib_FlashMessage with \TYPO3\CMS\Core\Messaging\FlashMessage

AFAIK, this is used for constants, specifically \TYPO3\CMS\Core\Messaging\FlashMessage::NOTICE, only
Remove deprecated calls to flashMessageContainer->add
Replace deprecated t3lib_BEfunc with \TYPO3\CMS\Backend\Utility\BackendUtility
Replaced deprecated t3lib_tsparser_ext with \TYPO3\CMS\Core\TypoScript\ExtendedTemplateService
Replaced deprecated t3lib_pagerenderer with TYPO3\CMS\Core\Page\PageRenderer
Replace deprecated t3lib_mail_message with TYPO3\CMS\Core\Mail\MailMessage
Replaced deprecated t3lib_timeTrack with TYPO3\CMS\Core\TimeTracker\TimeTracker
Replaced deprecated t3lib_Singleton with TYPO3\CMS\Core\SingletonInterface
Replace deprecated t3lib_pageSelect with \TYPO3\CMS\Frontend\Page\PageRepository
Replaced deprecated t3lib_DB with \TYPO3\CMS\Core\Database\DatabaseConnection
Replaced deprecated t3lib_userAuthGroup with \TYPO3\CMS\Core\Authentication\BackendUserAuthentication
Replace flashMessageQueue handling
Even more flash message handling
Removed extraneous space (thanks to @r0tscher)
FIXED: Replace deprecated objectManager::create() with objectManager::get()

Fixes #26, thanks to @dscampari.
Merge pull request #25 from VolksmissionFreudenstadt/master

Compatibility with TYPO3 6.2 LTS