Adjustments and minor improvements:   * Check if PBXProductDirectory is set for XCode and use for BUILD_DIR   * Make install depend on and use install-growl   * Make install-growl depend on growl
Adjustments and minor improvements:
  * Check if PBXProductDirectory is set for XCode and use for BUILD_DIR
  * Make install depend on and use install-growl
  * Make install-growl depend on growl

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