[BUG] Add compatibility for TYPO3 6.2 - Refs. #4
[BUG] Refactored template selection based on TYPO3 version and added TYPO3 v6.2 login template - closes #6
[TASK] If pear version of Yubico.php is not installed, use a bundled version of Yubico.php - closes #5
[TASK] Check if pear version of Yubico.php can be used. If not, use bundled version - closes #5
[TASK] Shorten labels for extension config - closes #7