Make code portable, output to core/Support

- Moved the php script to /build/libraries (same as short-tags-remover is
  now)
- Added a parameter to the php script that takes the DIR_BASE as set in
  the grunt configuration
- Called the php script explicitly with php (so that the task can run
  under Windows too)
- Resulting file is now saved to core/Support
- Correctly handle async task execution
Move IDE symbols to Support directory
Merge pull request #2 from mlocati/korvin-master-symbols-generation

Make code portable, output to core/Support