* Improving the File Abstraction Layer
* UI Improvements for the Extension Manager
* Use for PHP mysqli instead of "mysql" module
* Further Changes:
- Removed extension statictemplates
- Improved TCA load mechanism
- Install Tool: Environment Checks
- Extbase: The rewritten property mapper is now the default mapper
- Fluid: Allow Fluid arrays only in ViewHelper arguments
- Extbase: Object persistence behaviour changed from implicit to explicit
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