Unified file access interface

[nec]

Hello,

Ogre should use the same interface to open/read/write/close files across all the libraries. (some use fopen, some i/ofstream and none accept the unicode file name)
This interface should be overridable and as simple as possible.
Every file name given to Ogre should be UTF8 encoded in order to be managed by all file systems (Ansi and Unicode).

[CABAListic]

While this is a valid request, I don't think this fits as a papercut due to the effort of its implementation. The standard library has poor support for unicode (actually, none at all for UTF-8), so this may be a little involved to do in a cross-platform manner.
Still, this has to be fixed eventually.

[binarycrusader]

Thought not perhaps a complete solution, I think PhysicsFS may be a nice fit, and it has some nifty functionality:

http://icculus.org/physfs/
http://icculus.org/physfs/docs/html/index.html

It's also under a zlib license.