365visual Effects portable mode

While this file sits next to effectcraft.exe, 365visual Effects keeps its settings, keyboard shortcuts,
crash-recovery files, logs and plug-ins in the 365visual Effects Data folder beside it instead of
%APPDATA%\365visual Effects. Copy the whole folder to move 365visual Effects with its settings.

The disk cache, media cache and conformed audio still go to %LOCALAPPDATA%\365visual Effects unless
you choose other folders in Edit > Preferences > Disk.

Delete this file to use the normal per-user settings folder (%APPDATA%\365visual Effects) instead.
If 365visual Effects Data can't be written (for example on a read-only drive), 365visual Effects logs a
warning and uses %APPDATA%\365visual Effects instead.
