Add Configuration Settings Storage Locations wiki page

Configuration-Settings-Storage-Locations.md

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+To the best of my knowledge the configuration settings for Manuskript are stored in the following locations.
+
+On GNU/Linux and Windows I have tried deleting these files / registry hive locations and by doing so I was able to reset Manuskript back to the default settings on the next startup of Manuskript.
+
+## GNU/Linux
+
+Files:
+- ~/.config/manuskript/manuskript.conf
+- ~/.config/manuskriptrc
+
+Directory:
+- ~/.local/share/manuskript/
+
+## Mac OS X:
+
+Files:
+- ~/Library/Preferences/com.manuskript.manuskript.plist
+- ~/Library/Preferences/ch.theologeek.www.manuskript.plist
+- ~/Library/Preferences/manuskript.plist
+
+See also [issue #314](https://github.com/olivierkes/manuskript/issues/314).
+
+## Windows
+
+Registry Hive:
+- HKEY_CURRENT_USER/Software/manuskript/manuskript