HostFS enhancements

[Septercius]

HostFS is currently limited to supporting a single drive using a folder contained within RPCEmu's data directory. There is no easy way of changing the folder and no way of adding additional drives.

HostFS should be enhanced as follows:

• Support up to four drives (:4 to :7).
• Allow the boot drive to be configured (*Configure HostFSDrive x), via a CMOS byte.
• Allow the boot option to be specified (load/run/etc).
• Provide a user interface to allow the mount points to be configured and the drives named.
• Allow the user to configure whether they want dot files (such as "~/.bash_history)" and system files (such as ".DS_Store" on a Mac) to be displayed, also via UI.

This will require changes to both RPCEmu itself, as well as the ARM source for the HostFS and HostFSFiler modules.

I have a semi-working version of a patch for this, but it needs reworking as it's been over six months since I last looked at it. As a concept, it does work, though.

These changes should also incorporate a fix for bug #18.

This should be cross-platform, so it's not restricted just to OS X.

If anyone would like to make feature requests for consideration, please add them here.