Remove some useless settings using the default values.
Remove the obsolete <Replacement> tag.
Update some documentation in the code, fix whitespace and unify line
endings.
Patch by otero, fixes#3268
This was SVN commit r17976.
Mount public in case we are starting Atlas and no mods are specified in
the config.
If users remove all mods and save this to the config and try to start
Atlas it will
crash, as it cannot find some needed files.
This was SVN commit r15678.