Enhancements for codebook
Merge remote-tracking branch 'origin/dev-alpha' into dev-alpha

* origin/dev-alpha: (23 commits)
  New type SimpleExecutableInterface
  Minor changes
  Kept the signature of Google Calculator get method valid
  Added missing AbstractIterator
  Added error handler to testing environment
  fixed issues in file iterator with empty files
  better error messages for autoloader
  fixed issue with error exception
  added reflection for backtracing
  fixed issue and enhanced file reflection
  added parser for mail error log
  fixed issues with creating file and made it possible to read multiple lines
  string can now be extended in both directions
  fixed issues with reg exp and made it public readable
  a file node can now return it's siblings
  enhanced test for textarea with new possibilities
  an html element can now return it's inner html and text
  enhanced array (especially index-key management)
  Added Lorem ipsum class
  added whitebox test for new class textarea
  ...