Axel Dörfler 5061f35c3f Installer: don't replace system/settings.
* Instead of removing "system" in the target completely, only
  replace all of its subfolders.
* The downside of the current solution is that extra files, and
  directories in "system" will not be removed. Improvements
  welcome.
2014-09-14 14:11:01 +02:00
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