So far, the various *-fs-factory.cpp files were #including the
corresponding *-fs.cpp files. This is surprising and hence could lead to
all kinds of problems). To fix this, provide proper headers for the
*-fs.cpp files.
This also makes code reuse via subclassing possible.
Since not all ports were tested, this will likely lead to a few
easy to fix compile regressions.
Also rearranged the factories into a new directory for clarity.
Note 1: The posix-file.h and cpp files are for testing only. Only the ds, ps2 and symbian architecture will use special BaseFile based objects.
Note 2: The current code does not yet make use of this new structure, since the Common::File remains intact.
svn-id: r28395
